Finding the Fourth Proportional to 13,881.98, 19,158.12 and 9,158.06

Step by Step Solution

1. Step 1: Write the proportion equation
   13,881.98 : 19,158.12 = 9,158.06 : x
2. Step 2: Convert to fraction form
   13,881.98/19,158.12 = 9,158.06/x
3. Step 3: Cross multiply
   13,881.98x = 19,158.12 × 9,158.06
4. Step 4: Simplify right side
   13,881.98x = 175,451,260.34
5. Step 5: Solve for x
   x = 175,451,260.34/13,881.98
6. Step 6: Final answer
   x = 12,638.78