Finding the Fourth Proportional to 112,915.86, 169,402.25 and 79,700.79

Step by Step Solution

1. Step 1: Write the proportion equation
   112,915.86 : 169,402.25 = 79,700.79 : x
2. Step 2: Convert to fraction form
   112,915.86/169,402.25 = 79,700.79/x
3. Step 3: Cross multiply
   112,915.86x = 169,402.25 × 79,700.79
4. Step 4: Simplify right side
   112,915.86x = 13,501,493,987.29
5. Step 5: Solve for x
   x = 13,501,493,987.29/112,915.86
6. Step 6: Final answer
   x = 119,571.28