Finding the Fourth Proportional to 1,088.34, 1,501.91 and 622.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,088.34 : 1,501.91 = 622.59 : x
2. Step 2: Convert to fraction form
   1,088.34/1,501.91 = 622.59/x
3. Step 3: Cross multiply
   1,088.34x = 1,501.91 × 622.59
4. Step 4: Simplify right side
   1,088.34x = 935,074.15
5. Step 5: Solve for x
   x = 935,074.15/1,088.34
6. Step 6: Final answer
   x = 859.17