Finding the Fourth Proportional to 111,557.72, 154,086.90 and 83,389.16

Step by Step Solution

1. Step 1: Write the proportion equation
   111,557.72 : 154,086.90 = 83,389.16 : x
2. Step 2: Convert to fraction form
   111,557.72/154,086.90 = 83,389.16/x
3. Step 3: Cross multiply
   111,557.72x = 154,086.90 × 83,389.16
4. Step 4: Simplify right side
   111,557.72x = 12,849,177,158.00
5. Step 5: Solve for x
   x = 12,849,177,158.00/111,557.72
6. Step 6: Final answer
   x = 115,179.63