Finding the Fourth Proportional to 64,494.18, 89,038.98 and 42,978.24

Step by Step Solution

1. Step 1: Write the proportion equation
   64,494.18 : 89,038.98 = 42,978.24 : x
2. Step 2: Convert to fraction form
   64,494.18/89,038.98 = 42,978.24/x
3. Step 3: Cross multiply
   64,494.18x = 89,038.98 × 42,978.24
4. Step 4: Simplify right side
   64,494.18x = 3,826,738,651.80
5. Step 5: Solve for x
   x = 3,826,738,651.80/64,494.18
6. Step 6: Final answer
   x = 59,334.64