Finding the Fourth Proportional to 111,978.17, 154,529.85 and 61,677.17

Step by Step Solution

1. Step 1: Write the proportion equation
   111,978.17 : 154,529.85 = 61,677.17 : x
2. Step 2: Convert to fraction form
   111,978.17/154,529.85 = 61,677.17/x
3. Step 3: Cross multiply
   111,978.17x = 154,529.85 × 61,677.17
4. Step 4: Simplify right side
   111,978.17x = 9,530,963,828.52
5. Step 5: Solve for x
   x = 9,530,963,828.52/111,978.17
6. Step 6: Final answer
   x = 85,114.48