Finding the Fourth Proportional to 111,980.18, 154,532.61 and 61,679.18

Step by Step Solution

1. Step 1: Write the proportion equation
   111,980.18 : 154,532.61 = 61,679.18 : x
2. Step 2: Convert to fraction form
   111,980.18/154,532.61 = 61,679.18/x
3. Step 3: Cross multiply
   111,980.18x = 154,532.61 × 61,679.18
4. Step 4: Simplify right side
   111,980.18x = 9,531,443,895.40
5. Step 5: Solve for x
   x = 9,531,443,895.40/111,980.18
6. Step 6: Final answer
   x = 85,117.24