Finding the Fourth Proportional to 1,077.63, 1,487.33 and 611.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,077.63 : 1,487.33 = 611.88 : x
2. Step 2: Convert to fraction form
   1,077.63/1,487.33 = 611.88/x
3. Step 3: Cross multiply
   1,077.63x = 1,487.33 × 611.88
4. Step 4: Simplify right side
   1,077.63x = 910,056.98
5. Step 5: Solve for x
   x = 910,056.98/1,077.63
6. Step 6: Final answer
   x = 844.50