Finding the Fourth Proportional to 525,889, 725,726.82 and 299,665.72

Step by Step Solution

1. Step 1: Write the proportion equation
   525,889 : 725,726.82 = 299,665.72 : x
2. Step 2: Convert to fraction form
   525,889/725,726.82 = 299,665.72/x
3. Step 3: Cross multiply
   525,889x = 725,726.82 × 299,665.72
4. Step 4: Simplify right side
   525,889x = 217,475,450,038.61
5. Step 5: Solve for x
   x = 217,475,450,038.61/525,889
6. Step 6: Final answer
   x = 413,538.69