Finding the Fourth Proportional to 2,298.93, 3,172.72 and 1,290.62

Step by Step Solution

1. Step 1: Write the proportion equation
   2,298.93 : 3,172.72 = 1,290.62 : x
2. Step 2: Convert to fraction form
   2,298.93/3,172.72 = 1,290.62/x
3. Step 3: Cross multiply
   2,298.93x = 3,172.72 × 1,290.62
4. Step 4: Simplify right side
   2,298.93x = 4,094,775.89
5. Step 5: Solve for x
   x = 4,094,775.89/2,298.93
6. Step 6: Final answer
   x = 1,781.17