Finding the Fourth Proportional to 72,004.50, 99,366.21 and 42,196.50

Step by Step Solution

1. Step 1: Write the proportion equation
   72,004.50 : 99,366.21 = 42,196.50 : x
2. Step 2: Convert to fraction form
   72,004.50/99,366.21 = 42,196.50/x
3. Step 3: Cross multiply
   72,004.50x = 99,366.21 × 42,196.50
4. Step 4: Simplify right side
   72,004.50x = 4,192,906,280.27
5. Step 5: Solve for x
   x = 4,192,906,280.27/72,004.50
6. Step 6: Final answer
   x = 58,231.17