Finding the Fourth Proportional to 111,892.77, 154,359.87 and 66,545.31

Step by Step Solution

1. Step 1: Write the proportion equation
   111,892.77 : 154,359.87 = 66,545.31 : x
2. Step 2: Convert to fraction form
   111,892.77/154,359.87 = 66,545.31/x
3. Step 3: Cross multiply
   111,892.77x = 154,359.87 × 66,545.31
4. Step 4: Simplify right side
   111,892.77x = 10,271,925,400.71
5. Step 5: Solve for x
   x = 10,271,925,400.71/111,892.77
6. Step 6: Final answer
   x = 91,801.51