Finding the Fourth Proportional to 81,111.04, 111,980.48 and 53,909.12

Step by Step Solution

1. Step 1: Write the proportion equation
   81,111.04 : 111,980.48 = 53,909.12 : x
2. Step 2: Convert to fraction form
   81,111.04/111,980.48 = 53,909.12/x
3. Step 3: Cross multiply
   81,111.04x = 111,980.48 × 53,909.12
4. Step 4: Simplify right side
   81,111.04x = 6,036,769,133.98
5. Step 5: Solve for x
   x = 6,036,769,133.98/81,111.04
6. Step 6: Final answer
   x = 74,425.99