Finding the Fourth Proportional to 1,624.05, 2,432.17 and 928.62

Step by Step Solution

1. Step 1: Write the proportion equation
   1,624.05 : 2,432.17 = 928.62 : x
2. Step 2: Convert to fraction form
   1,624.05/2,432.17 = 928.62/x
3. Step 3: Cross multiply
   1,624.05x = 2,432.17 × 928.62
4. Step 4: Simplify right side
   1,624.05x = 2,258,561.71
5. Step 5: Solve for x
   x = 2,258,561.71/1,624.05
6. Step 6: Final answer
   x = 1,390.70