Finding the Fourth Proportional to 12,688.75, 17,510.48 and 7,100.83

Step by Step Solution

1. Step 1: Write the proportion equation
   12,688.75 : 17,510.48 = 7,100.83 : x
2. Step 2: Convert to fraction form
   12,688.75/17,510.48 = 7,100.83/x
3. Step 3: Cross multiply
   12,688.75x = 17,510.48 × 7,100.83
4. Step 4: Simplify right side
   12,688.75x = 124,338,941.70
5. Step 5: Solve for x
   x = 124,338,941.70/12,688.75
6. Step 6: Final answer
   x = 9,799.15