Finding the Fourth Proportional to 1,543.47, 2,130.50 and 1,229.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,543.47 : 2,130.50 = 1,229.31 : x
2. Step 2: Convert to fraction form
   1,543.47/2,130.50 = 1,229.31/x
3. Step 3: Cross multiply
   1,543.47x = 2,130.50 × 1,229.31
4. Step 4: Simplify right side
   1,543.47x = 2,619,038.81
5. Step 5: Solve for x
   x = 2,619,038.81/1,543.47
6. Step 6: Final answer
   x = 1,696.85