Finding the Fourth Proportional to 2,146.90, 2,961.85 and 1,307.29

Step by Step Solution

1. Step 1: Write the proportion equation
   2,146.90 : 2,961.85 = 1,307.29 : x
2. Step 2: Convert to fraction form
   2,146.90/2,961.85 = 1,307.29/x
3. Step 3: Cross multiply
   2,146.90x = 2,961.85 × 1,307.29
4. Step 4: Simplify right side
   2,146.90x = 3,871,996.89
5. Step 5: Solve for x
   x = 3,871,996.89/2,146.90
6. Step 6: Final answer
   x = 1,803.53