Finding the Fourth Proportional to 123,375.56, 170,285.22 and 78,113.90

Step by Step Solution

1. Step 1: Write the proportion equation
   123,375.56 : 170,285.22 = 78,113.90 : x
2. Step 2: Convert to fraction form
   123,375.56/170,285.22 = 78,113.90/x
3. Step 3: Cross multiply
   123,375.56x = 170,285.22 × 78,113.90
4. Step 4: Simplify right side
   123,375.56x = 13,301,643,072.27
5. Step 5: Solve for x
   x = 13,301,643,072.27/123,375.56
6. Step 6: Final answer
   x = 107,814.25