Finding the Fourth Proportional to 72,355.88, 99,851.42 and 42,161.91

Step by Step Solution

1. Step 1: Write the proportion equation
   72,355.88 : 99,851.42 = 42,161.91 : x
2. Step 2: Convert to fraction form
   72,355.88/99,851.42 = 42,161.91/x
3. Step 3: Cross multiply
   72,355.88x = 99,851.42 × 42,161.91
4. Step 4: Simplify right side
   72,355.88x = 4,209,926,372.60
5. Step 5: Solve for x
   x = 4,209,926,372.60/72,355.88
6. Step 6: Final answer
   x = 58,183.61