Finding the Fourth Proportional to 89,510.88, 134,266.28 and 42,621.60

Step by Step Solution

1. Step 1: Write the proportion equation
   89,510.88 : 134,266.28 = 42,621.60 : x
2. Step 2: Convert to fraction form
   89,510.88/134,266.28 = 42,621.60/x
3. Step 3: Cross multiply
   89,510.88x = 134,266.28 × 42,621.60
4. Step 4: Simplify right side
   89,510.88x = 5,722,643,466.54
5. Step 5: Solve for x
   x = 5,722,643,466.54/89,510.88
6. Step 6: Final answer
   x = 63,932.38