Finding the Fourth Proportional to 525,429,263.87, 725,107,517.37 and 290,495,057.98

Step by Step Solution

1. Step 1: Write the proportion equation
   525,429,263.87 : 725,107,517.37 = 290,495,057.98 : x
2. Step 2: Convert to fraction form
   525,429,263.87/725,107,517.37 = 290,495,057.98/x
3. Step 3: Cross multiply
   525,429,263.87x = 725,107,517.37 × 290,495,057.98
4. Step 4: Simplify right side
   525,429,263.87x = 210,640,150,300,132,032
5. Step 5: Solve for x
   x = 210,640,150,300,132,032/525,429,263.87
6. Step 6: Final answer
   x = 400,891,546.75