Finding the Fourth Proportional to 1,910.64, 2,636.88 and 1,248.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,910.64 : 2,636.88 = 1,248.72 : x
2. Step 2: Convert to fraction form
   1,910.64/2,636.88 = 1,248.72/x
3. Step 3: Cross multiply
   1,910.64x = 2,636.88 × 1,248.72
4. Step 4: Simplify right side
   1,910.64x = 3,292,724.79
5. Step 5: Solve for x
   x = 3,292,724.79/1,910.64
6. Step 6: Final answer
   x = 1,723.36