Finding the Fourth Proportional to 1,118.52, 1,541.10 and 977.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,118.52 : 1,541.10 = 977.56 : x
2. Step 2: Convert to fraction form
   1,118.52/1,541.10 = 977.56/x
3. Step 3: Cross multiply
   1,118.52x = 1,541.10 × 977.56
4. Step 4: Simplify right side
   1,118.52x = 1,506,517.72
5. Step 5: Solve for x
   x = 1,506,517.72/1,118.52
6. Step 6: Final answer
   x = 1,346.88