Finding the Fourth Proportional to 1,320.10, 1,820.37 and 1,134.20

Step by Step Solution

1. Step 1: Write the proportion equation
   1,320.10 : 1,820.37 = 1,134.20 : x
2. Step 2: Convert to fraction form
   1,320.10/1,820.37 = 1,134.20/x
3. Step 3: Cross multiply
   1,320.10x = 1,820.37 × 1,134.20
4. Step 4: Simplify right side
   1,320.10x = 2,064,672.46
5. Step 5: Solve for x
   x = 2,064,672.46/1,320.10
6. Step 6: Final answer
   x = 1,564.03