Finding the Fourth Proportional to 1,612.22, 2,224.78 and 913.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,612.22 : 2,224.78 = 913.58 : x
2. Step 2: Convert to fraction form
   1,612.22/2,224.78 = 913.58/x
3. Step 3: Cross multiply
   1,612.22x = 2,224.78 × 913.58
4. Step 4: Simplify right side
   1,612.22x = 2,032,501.10
5. Step 5: Solve for x
   x = 2,032,501.10/1,612.22
6. Step 6: Final answer
   x = 1,260.69