Finding the Fourth Proportional to 1,776.89, 2,665.31 and 802.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,776.89 : 2,665.31 = 802.31 : x
2. Step 2: Convert to fraction form
   1,776.89/2,665.31 = 802.31/x
3. Step 3: Cross multiply
   1,776.89x = 2,665.31 × 802.31
4. Step 4: Simplify right side
   1,776.89x = 2,138,404.87
5. Step 5: Solve for x
   x = 2,138,404.87/1,776.89
6. Step 6: Final answer
   x = 1,203.45