Finding the Fourth Proportional to 72,442.50, 99,971.01 and 42,248.76

Step by Step Solution

1. Step 1: Write the proportion equation
   72,442.50 : 99,971.01 = 42,248.76 : x
2. Step 2: Convert to fraction form
   72,442.50/99,971.01 = 42,248.76/x
3. Step 3: Cross multiply
   72,442.50x = 99,971.01 × 42,248.76
4. Step 4: Simplify right side
   72,442.50x = 4,223,651,208.45
5. Step 5: Solve for x
   x = 4,223,651,208.45/72,442.50
6. Step 6: Final answer
   x = 58,303.50