Finding the Fourth Proportional to 90,061.26, 134,432.42 and 79,420.79

Step by Step Solution

1. Step 1: Write the proportion equation
   90,061.26 : 134,432.42 = 79,420.79 : x
2. Step 2: Convert to fraction form
   90,061.26/134,432.42 = 79,420.79/x
3. Step 3: Cross multiply
   90,061.26x = 134,432.42 × 79,420.79
4. Step 4: Simplify right side
   90,061.26x = 10,676,728,936.99
5. Step 5: Solve for x
   x = 10,676,728,936.99/90,061.26
6. Step 6: Final answer
   x = 118,549.63