Finding the Fourth Proportional to 1,620.50, 2,429.01 and 925.67

Step by Step Solution

1. Step 1: Write the proportion equation
   1,620.50 : 2,429.01 = 925.67 : x
2. Step 2: Convert to fraction form
   1,620.50/2,429.01 = 925.67/x
3. Step 3: Cross multiply
   1,620.50x = 2,429.01 × 925.67
4. Step 4: Simplify right side
   1,620.50x = 2,248,461.69
5. Step 5: Solve for x
   x = 2,248,461.69/1,620.50
6. Step 6: Final answer
   x = 1,387.51