Finding the Fourth Proportional to 78,387.58, 108,115.58 and 54,502.30

Step by Step Solution

1. Step 1: Write the proportion equation
   78,387.58 : 108,115.58 = 54,502.30 : x
2. Step 2: Convert to fraction form
   78,387.58/108,115.58 = 54,502.30/x
3. Step 3: Cross multiply
   78,387.58x = 108,115.58 × 54,502.30
4. Step 4: Simplify right side
   78,387.58x = 5,892,547,775.83
5. Step 5: Solve for x
   x = 5,892,547,775.83/78,387.58
6. Step 6: Final answer
   x = 75,171.96