Finding the Fourth Proportional to 2,070.72, 3,110.40 and 1,206.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,070.72 : 3,110.40 = 1,206.72 : x
2. Step 2: Convert to fraction form
   2,070.72/3,110.40 = 1,206.72/x
3. Step 3: Cross multiply
   2,070.72x = 3,110.40 × 1,206.72
4. Step 4: Simplify right side
   2,070.72x = 3,753,381.89
5. Step 5: Solve for x
   x = 3,753,381.89/2,070.72
6. Step 6: Final answer
   x = 1,812.60