Finding the Fourth Proportional to 2,131.71, 2,941.73 and 1,187.48

Step by Step Solution

1. Step 1: Write the proportion equation
   2,131.71 : 2,941.73 = 1,187.48 : x
2. Step 2: Convert to fraction form
   2,131.71/2,941.73 = 1,187.48/x
3. Step 3: Cross multiply
   2,131.71x = 2,941.73 × 1,187.48
4. Step 4: Simplify right side
   2,131.71x = 3,493,230.83
5. Step 5: Solve for x
   x = 3,493,230.83/2,131.71
6. Step 6: Final answer
   x = 1,638.70