Finding the Fourth Proportional to 2,131.29, 2,940.90 and 1,187.01

Step by Step Solution

1. Step 1: Write the proportion equation
   2,131.29 : 2,940.90 = 1,187.01 : x
2. Step 2: Convert to fraction form
   2,131.29/2,940.90 = 1,187.01/x
3. Step 3: Cross multiply
   2,131.29x = 2,940.90 × 1,187.01
4. Step 4: Simplify right side
   2,131.29x = 3,490,877.71
5. Step 5: Solve for x
   x = 3,490,877.71/2,131.29
6. Step 6: Final answer
   x = 1,637.92