Finding the Fourth Proportional to 111,371.52, 153,692.72 and 61,071.60

Step by Step Solution

1. Step 1: Write the proportion equation
   111,371.52 : 153,692.72 = 61,071.60 : x
2. Step 2: Convert to fraction form
   111,371.52/153,692.72 = 61,071.60/x
3. Step 3: Cross multiply
   111,371.52x = 153,692.72 × 61,071.60
4. Step 4: Simplify right side
   111,371.52x = 9,386,260,318.75
5. Step 5: Solve for x
   x = 9,386,260,318.75/111,371.52
6. Step 6: Final answer
   x = 84,278.82