Finding the Fourth Proportional to 1,612.50, 2,225.54 and 913.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,612.50 : 2,225.54 = 913.88 : x
2. Step 2: Convert to fraction form
   1,612.50/2,225.54 = 913.88/x
3. Step 3: Cross multiply
   1,612.50x = 2,225.54 × 913.88
4. Step 4: Simplify right side
   1,612.50x = 2,033,876.50
5. Step 5: Solve for x
   x = 2,033,876.50/1,612.50
6. Step 6: Final answer
   x = 1,261.32