Finding the Fourth Proportional to 111,964.68, 154,522.17 and 83,621.16

Step by Step Solution

1. Step 1: Write the proportion equation
   111,964.68 : 154,522.17 = 83,621.16 : x
2. Step 2: Convert to fraction form
   111,964.68/154,522.17 = 83,621.16/x
3. Step 3: Cross multiply
   111,964.68x = 154,522.17 × 83,621.16
4. Step 4: Simplify right side
   111,964.68x = 12,921,323,101.12
5. Step 5: Solve for x
   x = 12,921,323,101.12/111,964.68
6. Step 6: Final answer
   x = 115,405.35