Finding the Fourth Proportional to 1,359.89, 2,038.87 and 920.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,359.89 : 2,038.87 = 920.06 : x
2. Step 2: Convert to fraction form
   1,359.89/2,038.87 = 920.06/x
3. Step 3: Cross multiply
   1,359.89x = 2,038.87 × 920.06
4. Step 4: Simplify right side
   1,359.89x = 1,875,881.33
5. Step 5: Solve for x
   x = 1,875,881.33/1,359.89
6. Step 6: Final answer
   x = 1,379.44