Finding the Fourth Proportional to 1,640,123,663.20, 2,263,369,181.34 and 925,809,604.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,640,123,663.20 : 2,263,369,181.34 = 925,809,604.72 : x
2. Step 2: Convert to fraction form
   1,640,123,663.20/2,263,369,181.34 = 925,809,604.72/x
3. Step 3: Cross multiply
   1,640,123,663.20x = 2,263,369,181.34 × 925,809,604.72
4. Step 4: Simplify right side
   1,640,123,663.20x = 2,095,448,927,111,815,680
5. Step 5: Solve for x
   x = 2,095,448,927,111,815,680/1,640,123,663.20
6. Step 6: Final answer
   x = 1,277,616,422.55