Finding the Fourth Proportional to 1,087,139.38, 1,630,838.76 and 525,770.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,087,139.38 : 1,630,838.76 = 525,770.50 : x
2. Step 2: Convert to fraction form
   1,087,139.38/1,630,838.76 = 525,770.50/x
3. Step 3: Cross multiply
   1,087,139.38x = 1,630,838.76 × 525,770.50
4. Step 4: Simplify right side
   1,087,139.38x = 857,446,910,264.58
5. Step 5: Solve for x
   x = 857,446,910,264.58/1,087,139.38
6. Step 6: Final answer
   x = 788,718.47