Finding the Fourth Proportional to 1,640,255.70, 2,263,554.29 and 915,103.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,640,255.70 : 2,263,554.29 = 915,103.57 : x
2. Step 2: Convert to fraction form
   1,640,255.70/2,263,554.29 = 915,103.57/x
3. Step 3: Cross multiply
   1,640,255.70x = 2,263,554.29 × 915,103.57
4. Step 4: Simplify right side
   1,640,255.70x = 2,071,386,611,667.82
5. Step 5: Solve for x
   x = 2,071,386,611,667.82/1,640,255.70
6. Step 6: Final answer
   x = 1,262,843.72