Finding the Fourth Proportional to 39,768.32, 59,644.80 and 12,062.72

Step by Step Solution

1. Step 1: Write the proportion equation
   39,768.32 : 59,644.80 = 12,062.72 : x
2. Step 2: Convert to fraction form
   39,768.32/59,644.80 = 12,062.72/x
3. Step 3: Cross multiply
   39,768.32x = 59,644.80 × 12,062.72
4. Step 4: Simplify right side
   39,768.32x = 719,478,521.86
5. Step 5: Solve for x
   x = 719,478,521.86/39,768.32
6. Step 6: Final answer
   x = 18,091.75