Finding the Fourth Proportional to 1,640,855.72, 2,264,494.56 and 915,844.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,640,855.72 : 2,264,494.56 = 915,844.88 : x
2. Step 2: Convert to fraction form
   1,640,855.72/2,264,494.56 = 915,844.88/x
3. Step 3: Cross multiply
   1,640,855.72x = 2,264,494.56 × 915,844.88
4. Step 4: Simplify right side
   1,640,855.72x = 2,073,925,748,563.85
5. Step 5: Solve for x
   x = 2,073,925,748,563.85/1,640,855.72
6. Step 6: Final answer
   x = 1,263,929.38