Finding the Fourth Proportional to 2,100.98, 3,147.35 and 988.93

Step by Step Solution

1. Step 1: Write the proportion equation
   2,100.98 : 3,147.35 = 988.93 : x
2. Step 2: Convert to fraction form
   2,100.98/3,147.35 = 988.93/x
3. Step 3: Cross multiply
   2,100.98x = 3,147.35 × 988.93
4. Step 4: Simplify right side
   2,100.98x = 3,112,508.84
5. Step 5: Solve for x
   x = 3,112,508.84/2,100.98
6. Step 6: Final answer
   x = 1,481.46