Finding the Fourth Proportional to 123,613.28, 170,523.52 and 78,214.72

Step by Step Solution

1. Step 1: Write the proportion equation
   123,613.28 : 170,523.52 = 78,214.72 : x
2. Step 2: Convert to fraction form
   123,613.28/170,523.52 = 78,214.72/x
3. Step 3: Cross multiply
   123,613.28x = 170,523.52 × 78,214.72
4. Step 4: Simplify right side
   123,613.28x = 13,337,449,370.21
5. Step 5: Solve for x
   x = 13,337,449,370.21/123,613.28
6. Step 6: Final answer
   x = 107,896.57