Finding the Fourth Proportional to 1,094.80, 1,510.80 and 622.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,094.80 : 1,510.80 = 622.72 : x
2. Step 2: Convert to fraction form
   1,094.80/1,510.80 = 622.72/x
3. Step 3: Cross multiply
   1,094.80x = 1,510.80 × 622.72
4. Step 4: Simplify right side
   1,094.80x = 940,805.38
5. Step 5: Solve for x
   x = 940,805.38/1,094.80
6. Step 6: Final answer
   x = 859.34