Finding the Fourth Proportional to 123,483.88, 170,391.46 and 78,081.76

Step by Step Solution

1. Step 1: Write the proportion equation
   123,483.88 : 170,391.46 = 78,081.76 : x
2. Step 2: Convert to fraction form
   123,483.88/170,391.46 = 78,081.76/x
3. Step 3: Cross multiply
   123,483.88x = 170,391.46 × 78,081.76
4. Step 4: Simplify right side
   123,483.88x = 13,304,465,085.77
5. Step 5: Solve for x
   x = 13,304,465,085.77/123,483.88
6. Step 6: Final answer
   x = 107,742.53