Finding the Fourth Proportional to 15,870.42, 23,769.18 and 12,342.06

Step by Step Solution

1. Step 1: Write the proportion equation
   15,870.42 : 23,769.18 = 12,342.06 : x
2. Step 2: Convert to fraction form
   15,870.42/23,769.18 = 12,342.06/x
3. Step 3: Cross multiply
   15,870.42x = 23,769.18 × 12,342.06
4. Step 4: Simplify right side
   15,870.42x = 293,360,645.71
5. Step 5: Solve for x
   x = 293,360,645.71/15,870.42
6. Step 6: Final answer
   x = 18,484.74