Finding the Fourth Proportional to 525,410.50, 725,067.30 and 299,056

Step by Step Solution

1. Step 1: Write the proportion equation
   525,410.50 : 725,067.30 = 299,056 : x
2. Step 2: Convert to fraction form
   525,410.50/725,067.30 = 299,056/x
3. Step 3: Cross multiply
   525,410.50x = 725,067.30 × 299,056
4. Step 4: Simplify right side
   525,410.50x = 216,835,726,468.80
5. Step 5: Solve for x
   x = 216,835,726,468.80/525,410.50
6. Step 6: Final answer
   x = 412,697.74