Finding the Fourth Proportional to 538,686.86, 743,392.89 and 296,978.00

Step by Step Solution

1. Step 1: Write the proportion equation
   538,686.86 : 743,392.89 = 296,978.00 : x
2. Step 2: Convert to fraction form
   538,686.86/743,392.89 = 296,978.00/x
3. Step 3: Cross multiply
   538,686.86x = 743,392.89 × 296,978.00
4. Step 4: Simplify right side
   538,686.86x = 220,771,329,969.46
5. Step 5: Solve for x
   x = 220,771,329,969.46/538,686.86
6. Step 6: Final answer
   x = 409,832.41