Finding the Fourth Proportional to 39,470.86, 59,215.59 and 12,816.77

Step by Step Solution

1. Step 1: Write the proportion equation
   39,470.86 : 59,215.59 = 12,816.77 : x
2. Step 2: Convert to fraction form
   39,470.86/59,215.59 = 12,816.77/x
3. Step 3: Cross multiply
   39,470.86x = 59,215.59 × 12,816.77
4. Step 4: Simplify right side
   39,470.86x = 758,952,301.37
5. Step 5: Solve for x
   x = 758,952,301.37/39,470.86
6. Step 6: Final answer
   x = 19,228.17