Finding the Fourth Proportional to 1,077.79, 1,487.35 and 612.04

Step by Step Solution

1. Step 1: Write the proportion equation
   1,077.79 : 1,487.35 = 612.04 : x
2. Step 2: Convert to fraction form
   1,077.79/1,487.35 = 612.04/x
3. Step 3: Cross multiply
   1,077.79x = 1,487.35 × 612.04
4. Step 4: Simplify right side
   1,077.79x = 910,317.69
5. Step 5: Solve for x
   x = 910,317.69/1,077.79
6. Step 6: Final answer
   x = 844.62