Finding the Fourth Proportional to 2,170.32, 2,994.72 and 1,225.86

Step by Step Solution

1. Step 1: Write the proportion equation
   2,170.32 : 2,994.72 = 1,225.86 : x
2. Step 2: Convert to fraction form
   2,170.32/2,994.72 = 1,225.86/x
3. Step 3: Cross multiply
   2,170.32x = 2,994.72 × 1,225.86
4. Step 4: Simplify right side
   2,170.32x = 3,671,107.46
5. Step 5: Solve for x
   x = 3,671,107.46/2,170.32
6. Step 6: Final answer
   x = 1,691.51