Finding the Fourth Proportional to 111,978.29, 154,530.03 and 61,677.29

Step by Step Solution

1. Step 1: Write the proportion equation
   111,978.29 : 154,530.03 = 61,677.29 : x
2. Step 2: Convert to fraction form
   111,978.29/154,530.03 = 61,677.29/x
3. Step 3: Cross multiply
   111,978.29x = 154,530.03 × 61,677.29
4. Step 4: Simplify right side
   111,978.29x = 9,530,993,474.02
5. Step 5: Solve for x
   x = 9,530,993,474.02/111,978.29
6. Step 6: Final answer
   x = 85,114.65