Finding the Fourth Proportional to 1,432.71, 1,979.34 and 1,225.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,432.71 : 1,979.34 = 1,225.05 : x
2. Step 2: Convert to fraction form
   1,432.71/1,979.34 = 1,225.05/x
3. Step 3: Cross multiply
   1,432.71x = 1,979.34 × 1,225.05
4. Step 4: Simplify right side
   1,432.71x = 2,424,790.47
5. Step 5: Solve for x
   x = 2,424,790.47/1,432.71
6. Step 6: Final answer
   x = 1,692.45