Finding the Fourth Proportional to 103,978.42, 143,490.56 and 56,232.10

Step by Step Solution

1. Step 1: Write the proportion equation
   103,978.42 : 143,490.56 = 56,232.10 : x
2. Step 2: Convert to fraction form
   103,978.42/143,490.56 = 56,232.10/x
3. Step 3: Cross multiply
   103,978.42x = 143,490.56 × 56,232.10
4. Step 4: Simplify right side
   103,978.42x = 8,068,775,518.98
5. Step 5: Solve for x
   x = 8,068,775,518.98/103,978.42
6. Step 6: Final answer
   x = 77,600.48