Finding the Fourth Proportional to 2,129.47, 3,191.51 and 1,513.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,129.47 : 3,191.51 = 1,513.31 : x
2. Step 2: Convert to fraction form
   2,129.47/3,191.51 = 1,513.31/x
3. Step 3: Cross multiply
   2,129.47x = 3,191.51 × 1,513.31
4. Step 4: Simplify right side
   2,129.47x = 4,829,744.00
5. Step 5: Solve for x
   x = 4,829,744.00/2,129.47
6. Step 6: Final answer
   x = 2,268.05