Finding the Fourth Proportional to 2,131.52, 2,941.48 and 1,187.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,131.52 : 2,941.48 = 1,187.30 : x
2. Step 2: Convert to fraction form
   2,131.52/2,941.48 = 1,187.30/x
3. Step 3: Cross multiply
   2,131.52x = 2,941.48 × 1,187.30
4. Step 4: Simplify right side
   2,131.52x = 3,492,419.20
5. Step 5: Solve for x
   x = 3,492,419.20/2,131.52
6. Step 6: Final answer
   x = 1,638.46