Finding the Fourth Proportional to 111,839.87, 154,288.17 and 66,492.13

Step by Step Solution

1. Step 1: Write the proportion equation
   111,839.87 : 154,288.17 = 66,492.13 : x
2. Step 2: Convert to fraction form
   111,839.87/154,288.17 = 66,492.13/x
3. Step 3: Cross multiply
   111,839.87x = 154,288.17 × 66,492.13
4. Step 4: Simplify right side
   111,839.87x = 10,258,949,057.10
5. Step 5: Solve for x
   x = 10,258,949,057.10/111,839.87
6. Step 6: Final answer
   x = 91,728.91