Finding the Fourth Proportional to 14,243.57, 19,656.34 and 7,870.31

Step by Step Solution

1. Step 1: Write the proportion equation
   14,243.57 : 19,656.34 = 7,870.31 : x
2. Step 2: Convert to fraction form
   14,243.57/19,656.34 = 7,870.31/x
3. Step 3: Cross multiply
   14,243.57x = 19,656.34 × 7,870.31
4. Step 4: Simplify right side
   14,243.57x = 154,701,489.27
5. Step 5: Solve for x
   x = 154,701,489.27/14,243.57
6. Step 6: Final answer
   x = 10,861.15