Finding the Fourth Proportional to 71,899.50, 99,228.72 and 43,228.52

Step by Step Solution

1. Step 1: Write the proportion equation
   71,899.50 : 99,228.72 = 43,228.52 : x
2. Step 2: Convert to fraction form
   71,899.50/99,228.72 = 43,228.52/x
3. Step 3: Cross multiply
   71,899.50x = 99,228.72 × 43,228.52
4. Step 4: Simplify right side
   71,899.50x = 4,289,510,707.09
5. Step 5: Solve for x
   x = 4,289,510,707.09/71,899.50
6. Step 6: Final answer
   x = 59,659.81