Finding the Fourth Proportional to 111,981.43, 154,534.34 and 61,680.43

Step by Step Solution

1. Step 1: Write the proportion equation
   111,981.43 : 154,534.34 = 61,680.43 : x
2. Step 2: Convert to fraction form
   111,981.43/154,534.34 = 61,680.43/x
3. Step 3: Cross multiply
   111,981.43x = 154,534.34 × 61,680.43
4. Step 4: Simplify right side
   111,981.43x = 9,531,743,459.89
5. Step 5: Solve for x
   x = 9,531,743,459.89/111,981.43
6. Step 6: Final answer
   x = 85,118.97