Finding the Fourth Proportional to 1,060.79, 1,463.89 and 618.93

Step by Step Solution

1. Step 1: Write the proportion equation
   1,060.79 : 1,463.89 = 618.93 : x
2. Step 2: Convert to fraction form
   1,060.79/1,463.89 = 618.93/x
3. Step 3: Cross multiply
   1,060.79x = 1,463.89 × 618.93
4. Step 4: Simplify right side
   1,060.79x = 906,043.89
5. Step 5: Solve for x
   x = 906,043.89/1,060.79
6. Step 6: Final answer
   x = 854.13