Finding the Fourth Proportional to 72,255.48, 99,680.94 and 55,459.32

Step by Step Solution

1. Step 1: Write the proportion equation
   72,255.48 : 99,680.94 = 55,459.32 : x
2. Step 2: Convert to fraction form
   72,255.48/99,680.94 = 55,459.32/x
3. Step 3: Cross multiply
   72,255.48x = 99,680.94 × 55,459.32
4. Step 4: Simplify right side
   72,255.48x = 5,528,237,149.36
5. Step 5: Solve for x
   x = 5,528,237,149.36/72,255.48
6. Step 6: Final answer
   x = 76,509.59