Finding the Fourth Proportional to 123,372.52, 170,247.46 and 72,378.28

Step by Step Solution

1. Step 1: Write the proportion equation
   123,372.52 : 170,247.46 = 72,378.28 : x
2. Step 2: Convert to fraction form
   123,372.52/170,247.46 = 72,378.28/x
3. Step 3: Cross multiply
   123,372.52x = 170,247.46 × 72,378.28
4. Step 4: Simplify right side
   123,372.52x = 12,322,218,329.17
5. Step 5: Solve for x
   x = 12,322,218,329.17/123,372.52
6. Step 6: Final answer
   x = 99,878.14