Finding the Fourth Proportional to 103,682.10, 155,687.18 and 78,750.30

Step by Step Solution

1. Step 1: Write the proportion equation
   103,682.10 : 155,687.18 = 78,750.30 : x
2. Step 2: Convert to fraction form
   103,682.10/155,687.18 = 78,750.30/x
3. Step 3: Cross multiply
   103,682.10x = 155,687.18 × 78,750.30
4. Step 4: Simplify right side
   103,682.10x = 12,260,412,131.15
5. Step 5: Solve for x
   x = 12,260,412,131.15/103,682.10
6. Step 6: Final answer
   x = 118,250.04