Finding the Fourth Proportional to 121,558.72, 167,693.52 and 79,101.76

Step by Step Solution

1. Step 1: Write the proportion equation
   121,558.72 : 167,693.52 = 79,101.76 : x
2. Step 2: Convert to fraction form
   121,558.72/167,693.52 = 79,101.76/x
3. Step 3: Cross multiply
   121,558.72x = 167,693.52 × 79,101.76
4. Step 4: Simplify right side
   121,558.72x = 13,264,852,572.60
5. Step 5: Solve for x
   x = 13,264,852,572.60/121,558.72
6. Step 6: Final answer
   x = 109,123.00