Finding the Fourth Proportional to 71,790.78, 99,074.79 and 43,499.10

Step by Step Solution

1. Step 1: Write the proportion equation
   71,790.78 : 99,074.79 = 43,499.10 : x
2. Step 2: Convert to fraction form
   71,790.78/99,074.79 = 43,499.10/x
3. Step 3: Cross multiply
   71,790.78x = 99,074.79 × 43,499.10
4. Step 4: Simplify right side
   71,790.78x = 4,309,664,197.69
5. Step 5: Solve for x
   x = 4,309,664,197.69/71,790.78
6. Step 6: Final answer
   x = 60,030.89