Finding the Fourth Proportional to 1,550.86, 2,139.50 and 929.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,550.86 : 2,139.50 = 929.50 : x
2. Step 2: Convert to fraction form
   1,550.86/2,139.50 = 929.50/x
3. Step 3: Cross multiply
   1,550.86x = 2,139.50 × 929.50
4. Step 4: Simplify right side
   1,550.86x = 1,988,665.25
5. Step 5: Solve for x
   x = 1,988,665.25/1,550.86
6. Step 6: Final answer
   x = 1,282.30