Finding the Fourth Proportional to 1,755,128.60, 2,631,915.30 and 808,789.40

Step by Step Solution

1. Step 1: Write the proportion equation
   1,755,128.60 : 2,631,915.30 = 808,789.40 : x
2. Step 2: Convert to fraction form
   1,755,128.60/2,631,915.30 = 808,789.40/x
3. Step 3: Cross multiply
   1,755,128.60x = 2,631,915.30 × 808,789.40
4. Step 4: Simplify right side
   1,755,128.60x = 2,128,665,196,337.82
5. Step 5: Solve for x
   x = 2,128,665,196,337.82/1,755,128.60
6. Step 6: Final answer
   x = 1,212,825.77