Finding the Fourth Proportional to 1,642.76, 2,459.27 and 991.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,642.76 : 2,459.27 = 991.52 : x
2. Step 2: Convert to fraction form
   1,642.76/2,459.27 = 991.52/x
3. Step 3: Cross multiply
   1,642.76x = 2,459.27 × 991.52
4. Step 4: Simplify right side
   1,642.76x = 2,438,410.43
5. Step 5: Solve for x
   x = 2,438,410.43/1,642.76
6. Step 6: Final answer
   x = 1,484.34