Finding the Fourth Proportional to 1,345.30, 2,019.48 and 760.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,345.30 : 2,019.48 = 760.30 : x
2. Step 2: Convert to fraction form
   1,345.30/2,019.48 = 760.30/x
3. Step 3: Cross multiply
   1,345.30x = 2,019.48 × 760.30
4. Step 4: Simplify right side
   1,345.30x = 1,535,410.64
5. Step 5: Solve for x
   x = 1,535,410.64/1,345.30
6. Step 6: Final answer
   x = 1,141.31