Finding the Fourth Proportional to 112,906.56, 169,388.31 and 79,691.50

Step by Step Solution

1. Step 1: Write the proportion equation
   112,906.56 : 169,388.31 = 79,691.50 : x
2. Step 2: Convert to fraction form
   112,906.56/169,388.31 = 79,691.50/x
3. Step 3: Cross multiply
   112,906.56x = 169,388.31 × 79,691.50
4. Step 4: Simplify right side
   112,906.56x = 13,498,808,064.13
5. Step 5: Solve for x
   x = 13,498,808,064.13/112,906.56
6. Step 6: Final answer
   x = 119,557.34