Finding the Fourth Proportional to 12,875.10, 17,758.47 and 11,816.28

Step by Step Solution

1. Step 1: Write the proportion equation
   12,875.10 : 17,758.47 = 11,816.28 : x
2. Step 2: Convert to fraction form
   12,875.10/17,758.47 = 11,816.28/x
3. Step 3: Cross multiply
   12,875.10x = 17,758.47 × 11,816.28
4. Step 4: Simplify right side
   12,875.10x = 209,839,053.89
5. Step 5: Solve for x
   x = 209,839,053.89/12,875.10
6. Step 6: Final answer
   x = 16,298.05