Finding the Fourth Proportional to 111,978.68, 154,530.54 and 61,677.68

Step by Step Solution

1. Step 1: Write the proportion equation
   111,978.68 : 154,530.54 = 61,677.68 : x
2. Step 2: Convert to fraction form
   111,978.68/154,530.54 = 61,677.68/x
3. Step 3: Cross multiply
   111,978.68x = 154,530.54 × 61,677.68
4. Step 4: Simplify right side
   111,978.68x = 9,531,084,423.69
5. Step 5: Solve for x
   x = 9,531,084,423.69/111,978.68
6. Step 6: Final answer
   x = 85,115.17