Finding the Fourth Proportional to 1,380.24, 2,065.50 and 1,053

Step by Step Solution

1. Step 1: Write the proportion equation
   1,380.24 : 2,065.50 = 1,053 : x
2. Step 2: Convert to fraction form
   1,380.24/2,065.50 = 1,053/x
3. Step 3: Cross multiply
   1,380.24x = 2,065.50 × 1,053
4. Step 4: Simplify right side
   1,380.24x = 2,174,971.50
5. Step 5: Solve for x
   x = 2,174,971.50/1,380.24
6. Step 6: Final answer
   x = 1,575.79