Finding the Fourth Proportional to 1,407.80, 2,109.27 and 974.45

Step by Step Solution

1. Step 1: Write the proportion equation
   1,407.80 : 2,109.27 = 974.45 : x
2. Step 2: Convert to fraction form
   1,407.80/2,109.27 = 974.45/x
3. Step 3: Cross multiply
   1,407.80x = 2,109.27 × 974.45
4. Step 4: Simplify right side
   1,407.80x = 2,055,378.15
5. Step 5: Solve for x
   x = 2,055,378.15/1,407.80
6. Step 6: Final answer
   x = 1,459.99