Finding the Fourth Proportional to 14,243.81, 19,656.27 and 7,870.39

Step by Step Solution

1. Step 1: Write the proportion equation
   14,243.81 : 19,656.27 = 7,870.39 : x
2. Step 2: Convert to fraction form
   14,243.81/19,656.27 = 7,870.39/x
3. Step 3: Cross multiply
   14,243.81x = 19,656.27 × 7,870.39
4. Step 4: Simplify right side
   14,243.81x = 154,702,461.70
5. Step 5: Solve for x
   x = 154,702,461.70/14,243.81
6. Step 6: Final answer
   x = 10,861.03