Finding the Fourth Proportional to 12,818.48, 17,688.93 and 7,152.92

Step by Step Solution

1. Step 1: Write the proportion equation
   12,818.48 : 17,688.93 = 7,152.92 : x
2. Step 2: Convert to fraction form
   12,818.48/17,688.93 = 7,152.92/x
3. Step 3: Cross multiply
   12,818.48x = 17,688.93 × 7,152.92
4. Step 4: Simplify right side
   12,818.48x = 126,527,501.18
5. Step 5: Solve for x
   x = 126,527,501.18/12,818.48
6. Step 6: Final answer
   x = 9,870.71