Finding the Fourth Proportional to 12,875.86, 17,768.73 and 7,210.87

Step by Step Solution

1. Step 1: Write the proportion equation
   12,875.86 : 17,768.73 = 7,210.87 : x
2. Step 2: Convert to fraction form
   12,875.86/17,768.73 = 7,210.87/x
3. Step 3: Cross multiply
   12,875.86x = 17,768.73 × 7,210.87
4. Step 4: Simplify right side
   12,875.86x = 128,128,002.10
5. Step 5: Solve for x
   x = 128,128,002.10/12,875.86
6. Step 6: Final answer
   x = 9,951.02