Finding the Fourth Proportional to 81,441.60, 122,158.35 and 42,002.70

Step by Step Solution

1. Step 1: Write the proportion equation
   81,441.60 : 122,158.35 = 42,002.70 : x
2. Step 2: Convert to fraction form
   81,441.60/122,158.35 = 42,002.70/x
3. Step 3: Cross multiply
   81,441.60x = 122,158.35 × 42,002.70
4. Step 4: Simplify right side
   81,441.60x = 5,130,980,527.55
5. Step 5: Solve for x
   x = 5,130,980,527.55/81,441.60
6. Step 6: Final answer
   x = 63,001.96