Finding the Fourth Proportional to 1,385.39, 2,079.90 and 974.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,385.39 : 2,079.90 = 974.72 : x
2. Step 2: Convert to fraction form
   1,385.39/2,079.90 = 974.72/x
3. Step 3: Cross multiply
   1,385.39x = 2,079.90 × 974.72
4. Step 4: Simplify right side
   1,385.39x = 2,027,309.73
5. Step 5: Solve for x
   x = 2,027,309.73/1,385.39
6. Step 6: Final answer
   x = 1,463.35