Finding the Fourth Proportional to 12,061.32, 18,009.87 and 10,643.92

Step by Step Solution

1. Step 1: Write the proportion equation
   12,061.32 : 18,009.87 = 10,643.92 : x
2. Step 2: Convert to fraction form
   12,061.32/18,009.87 = 10,643.92/x
3. Step 3: Cross multiply
   12,061.32x = 18,009.87 × 10,643.92
4. Step 4: Simplify right side
   12,061.32x = 191,695,615.49
5. Step 5: Solve for x
   x = 191,695,615.49/12,061.32
6. Step 6: Final answer
   x = 15,893.42