Finding the Fourth Proportional to 123,113.28, 169,858.52 and 75,316.80

Step by Step Solution

1. Step 1: Write the proportion equation
   123,113.28 : 169,858.52 = 75,316.80 : x
2. Step 2: Convert to fraction form
   123,113.28/169,858.52 = 75,316.80/x
3. Step 3: Cross multiply
   123,113.28x = 169,858.52 × 75,316.80
4. Step 4: Simplify right side
   123,113.28x = 12,793,200,179.14
5. Step 5: Solve for x
   x = 12,793,200,179.14/123,113.28
6. Step 6: Final answer
   x = 103,914.06