Finding the Fourth Proportional to 1,573.47, 2,172.06 and 983.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,573.47 : 2,172.06 = 983.88 : x
2. Step 2: Convert to fraction form
   1,573.47/2,172.06 = 983.88/x
3. Step 3: Cross multiply
   1,573.47x = 2,172.06 × 983.88
4. Step 4: Simplify right side
   1,573.47x = 2,137,046.39
5. Step 5: Solve for x
   x = 2,137,046.39/1,573.47
6. Step 6: Final answer
   x = 1,358.17