Finding the Fourth Proportional to 72,171.46, 99,598.74 and 40,340.44

Step by Step Solution

1. Step 1: Write the proportion equation
   72,171.46 : 99,598.74 = 40,340.44 : x
2. Step 2: Convert to fraction form
   72,171.46/99,598.74 = 40,340.44/x
3. Step 3: Cross multiply
   72,171.46x = 99,598.74 × 40,340.44
4. Step 4: Simplify right side
   72,171.46x = 4,017,856,746.05
5. Step 5: Solve for x
   x = 4,017,856,746.05/72,171.46
6. Step 6: Final answer
   x = 55,670.99