Finding the Fourth Proportional to 1,345.78, 2,017.89 and 752.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,345.78 : 2,017.89 = 752.98 : x
2. Step 2: Convert to fraction form
   1,345.78/2,017.89 = 752.98/x
3. Step 3: Cross multiply
   1,345.78x = 2,017.89 × 752.98
4. Step 4: Simplify right side
   1,345.78x = 1,519,430.81
5. Step 5: Solve for x
   x = 1,519,430.81/1,345.78
6. Step 6: Final answer
   x = 1,129.03