Finding the Fourth Proportional to 1,060.60, 1,463.88 and 618.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,060.60 : 1,463.88 = 618.72 : x
2. Step 2: Convert to fraction form
   1,060.60/1,463.88 = 618.72/x
3. Step 3: Cross multiply
   1,060.60x = 1,463.88 × 618.72
4. Step 4: Simplify right side
   1,060.60x = 905,731.83
5. Step 5: Solve for x
   x = 905,731.83/1,060.60
6. Step 6: Final answer
   x = 853.98