Finding the Fourth Proportional to 2,100.17, 3,146.75 and 988.38

Step by Step Solution

1. Step 1: Write the proportion equation
   2,100.17 : 3,146.75 = 988.38 : x
2. Step 2: Convert to fraction form
   2,100.17/3,146.75 = 988.38/x
3. Step 3: Cross multiply
   2,100.17x = 3,146.75 × 988.38
4. Step 4: Simplify right side
   2,100.17x = 3,110,179.82
5. Step 5: Solve for x
   x = 3,110,179.82/2,100.17
6. Step 6: Final answer
   x = 1,480.92