Finding the Fourth Proportional to 525,665.28, 725,418.38 and 283,947.83

Step by Step Solution

1. Step 1: Write the proportion equation
   525,665.28 : 725,418.38 = 283,947.83 : x
2. Step 2: Convert to fraction form
   525,665.28/725,418.38 = 283,947.83/x
3. Step 3: Cross multiply
   525,665.28x = 725,418.38 × 283,947.83
4. Step 4: Simplify right side
   525,665.28x = 205,980,969,796.28
5. Step 5: Solve for x
   x = 205,980,969,796.28/525,665.28
6. Step 6: Final answer
   x = 391,848.15