Finding the Fourth Proportional to 111,965.18, 154,522.86 and 83,621.66

Step by Step Solution

1. Step 1: Write the proportion equation
   111,965.18 : 154,522.86 = 83,621.66 : x
2. Step 2: Convert to fraction form
   111,965.18/154,522.86 = 83,621.66/x
3. Step 3: Cross multiply
   111,965.18x = 154,522.86 × 83,621.66
4. Step 4: Simplify right side
   111,965.18x = 12,921,458,061.15
5. Step 5: Solve for x
   x = 12,921,458,061.15/111,965.18
6. Step 6: Final answer
   x = 115,406.04