Finding the Fourth Proportional to 111,992.80, 154,548.72 and 61,690.72

Step by Step Solution

1. Step 1: Write the proportion equation
   111,992.80 : 154,548.72 = 61,690.72 : x
2. Step 2: Convert to fraction form
   111,992.80/154,548.72 = 61,690.72/x
3. Step 3: Cross multiply
   111,992.80x = 154,548.72 × 61,690.72
4. Step 4: Simplify right side
   111,992.80x = 9,534,221,811.88
5. Step 5: Solve for x
   x = 9,534,221,811.88/111,992.80
6. Step 6: Final answer
   x = 85,132.45