Finding the Fourth Proportional to 43,162.72, 64,752.72 and 13,588

Step by Step Solution

1. Step 1: Write the proportion equation
   43,162.72 : 64,752.72 = 13,588 : x
2. Step 2: Convert to fraction form
   43,162.72/64,752.72 = 13,588/x
3. Step 3: Cross multiply
   43,162.72x = 64,752.72 × 13,588
4. Step 4: Simplify right side
   43,162.72x = 879,859,959.36
5. Step 5: Solve for x
   x = 879,859,959.36/43,162.72
6. Step 6: Final answer
   x = 20,384.72