Finding the Fourth Proportional to 71,769.66, 99,059.72 and 55,605

Step by Step Solution

1. Step 1: Write the proportion equation
   71,769.66 : 99,059.72 = 55,605 : x
2. Step 2: Convert to fraction form
   71,769.66/99,059.72 = 55,605/x
3. Step 3: Cross multiply
   71,769.66x = 99,059.72 × 55,605
4. Step 4: Simplify right side
   71,769.66x = 5,508,215,452.58
5. Step 5: Solve for x
   x = 5,508,215,452.58/71,769.66
6. Step 6: Final answer
   x = 76,748.52