Finding the Fourth Proportional to 72,417.89, 99,934.98 and 40,152.35

Step by Step Solution

1. Step 1: Write the proportion equation
   72,417.89 : 99,934.98 = 40,152.35 : x
2. Step 2: Convert to fraction form
   72,417.89/99,934.98 = 40,152.35/x
3. Step 3: Cross multiply
   72,417.89x = 99,934.98 × 40,152.35
4. Step 4: Simplify right side
   72,417.89x = 4,012,624,294.20
5. Step 5: Solve for x
   x = 4,012,624,294.20/72,417.89
6. Step 6: Final answer
   x = 55,409.30