Finding the Fourth Proportional to 2,453.50, 3,681.06 and 991.86

Step by Step Solution

1. Step 1: Write the proportion equation
   2,453.50 : 3,681.06 = 991.86 : x
2. Step 2: Convert to fraction form
   2,453.50/3,681.06 = 991.86/x
3. Step 3: Cross multiply
   2,453.50x = 3,681.06 × 991.86
4. Step 4: Simplify right side
   2,453.50x = 3,651,096.17
5. Step 5: Solve for x
   x = 3,651,096.17/2,453.50
6. Step 6: Final answer
   x = 1,488.12