Finding the Fourth Proportional to 2,221.53, 3,065.31 and 1,277.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,221.53 : 3,065.31 = 1,277.10 : x
2. Step 2: Convert to fraction form
   2,221.53/3,065.31 = 1,277.10/x
3. Step 3: Cross multiply
   2,221.53x = 3,065.31 × 1,277.10
4. Step 4: Simplify right side
   2,221.53x = 3,914,707.40
5. Step 5: Solve for x
   x = 3,914,707.40/2,221.53
6. Step 6: Final answer
   x = 1,762.17