Finding the Fourth Proportional to 40,079.86, 60,128.37 and 12,002.08

Step by Step Solution

1. Step 1: Write the proportion equation
   40,079.86 : 60,128.37 = 12,002.08 : x
2. Step 2: Convert to fraction form
   40,079.86/60,128.37 = 12,002.08/x
3. Step 3: Cross multiply
   40,079.86x = 60,128.37 × 12,002.08
4. Step 4: Simplify right side
   40,079.86x = 721,665,507.01
5. Step 5: Solve for x
   x = 721,665,507.01/40,079.86
6. Step 6: Final answer
   x = 18,005.69