Finding the Fourth Proportional to 39,978.91, 59,976.60 and 15,018.94

Step by Step Solution

1. Step 1: Write the proportion equation
   39,978.91 : 59,976.60 = 15,018.94 : x
2. Step 2: Convert to fraction form
   39,978.91/59,976.60 = 15,018.94/x
3. Step 3: Cross multiply
   39,978.91x = 59,976.60 × 15,018.94
4. Step 4: Simplify right side
   39,978.91x = 900,784,956.80
5. Step 5: Solve for x
   x = 900,784,956.80/39,978.91
6. Step 6: Final answer
   x = 22,531.50