Finding the Fourth Proportional to 65,987.84, 99,434.48 and 54,557.12

Step by Step Solution

1. Step 1: Write the proportion equation
   65,987.84 : 99,434.48 = 54,557.12 : x
2. Step 2: Convert to fraction form
   65,987.84/99,434.48 = 54,557.12/x
3. Step 3: Cross multiply
   65,987.84x = 99,434.48 × 54,557.12
4. Step 4: Simplify right side
   65,987.84x = 5,424,858,857.50
5. Step 5: Solve for x
   x = 5,424,858,857.50/65,987.84
6. Step 6: Final answer
   x = 82,209.98