Finding the Fourth Proportional to 39,159.79, 58,737.86 and 12,864.76

Step by Step Solution

1. Step 1: Write the proportion equation
   39,159.79 : 58,737.86 = 12,864.76 : x
2. Step 2: Convert to fraction form
   39,159.79/58,737.86 = 12,864.76/x
3. Step 3: Cross multiply
   39,159.79x = 58,737.86 × 12,864.76
4. Step 4: Simplify right side
   39,159.79x = 755,648,308.89
5. Step 5: Solve for x
   x = 755,648,308.89/39,159.79
6. Step 6: Final answer
   x = 19,296.54