Finding the Fourth Proportional to 2,298.94, 3,172.57 and 1,251

Step by Step Solution

1. Step 1: Write the proportion equation
   2,298.94 : 3,172.57 = 1,251 : x
2. Step 2: Convert to fraction form
   2,298.94/3,172.57 = 1,251/x
3. Step 3: Cross multiply
   2,298.94x = 3,172.57 × 1,251
4. Step 4: Simplify right side
   2,298.94x = 3,968,881.94
5. Step 5: Solve for x
   x = 3,968,881.94/2,298.94
6. Step 6: Final answer
   x = 1,726.40