Finding the Fourth Proportional to 1,091.59, 1,506.37 and 625.81

Step by Step Solution

1. Step 1: Write the proportion equation
   1,091.59 : 1,506.37 = 625.81 : x
2. Step 2: Convert to fraction form
   1,091.59/1,506.37 = 625.81/x
3. Step 3: Cross multiply
   1,091.59x = 1,506.37 × 625.81
4. Step 4: Simplify right side
   1,091.59x = 942,705.96
5. Step 5: Solve for x
   x = 942,705.96/1,091.59
6. Step 6: Final answer
   x = 863.61