Finding the Fourth Proportional to 2,691.61, 4,038.98 and 1,131.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,691.61 : 4,038.98 = 1,131.50 : x
2. Step 2: Convert to fraction form
   2,691.61/4,038.98 = 1,131.50/x
3. Step 3: Cross multiply
   2,691.61x = 4,038.98 × 1,131.50
4. Step 4: Simplify right side
   2,691.61x = 4,570,080.02
5. Step 5: Solve for x
   x = 4,570,080.02/2,691.61
6. Step 6: Final answer
   x = 1,697.90