Finding the Fourth Proportional to 519,978.94, 779,869.77 and 253,471.42

Step by Step Solution

1. Step 1: Write the proportion equation
   519,978.94 : 779,869.77 = 253,471.42 : x
2. Step 2: Convert to fraction form
   519,978.94/779,869.77 = 253,471.42/x
3. Step 3: Cross multiply
   519,978.94x = 779,869.77 × 253,471.42
4. Step 4: Simplify right side
   519,978.94x = 197,674,695,116.78
5. Step 5: Solve for x
   x = 197,674,695,116.78/519,978.94
6. Step 6: Final answer
   x = 380,159.04