Finding the Fourth Proportional to 516,978.02, 713,422.82 and 290,623.52

Step by Step Solution

1. Step 1: Write the proportion equation
   516,978.02 : 713,422.82 = 290,623.52 : x
2. Step 2: Convert to fraction form
   516,978.02/713,422.82 = 290,623.52/x
3. Step 3: Cross multiply
   516,978.02x = 713,422.82 × 290,623.52
4. Step 4: Simplify right side
   516,978.02x = 207,337,451,196.73
5. Step 5: Solve for x
   x = 207,337,451,196.73/516,978.02
6. Step 6: Final answer
   x = 401,056.61