Finding the Fourth Proportional to 111,577.59, 153,978.17 and 61,276.59

Step by Step Solution

1. Step 1: Write the proportion equation
   111,577.59 : 153,978.17 = 61,276.59 : x
2. Step 2: Convert to fraction form
   111,577.59/153,978.17 = 61,276.59/x
3. Step 3: Cross multiply
   111,577.59x = 153,978.17 × 61,276.59
4. Step 4: Simplify right side
   111,577.59x = 9,435,256,885.66
5. Step 5: Solve for x
   x = 9,435,256,885.66/111,577.59
6. Step 6: Final answer
   x = 84,562.29