Finding the Fourth Proportional to 1,345.61, 1,856.98 and 756.19

Step by Step Solution

1. Step 1: Write the proportion equation
   1,345.61 : 1,856.98 = 756.19 : x
2. Step 2: Convert to fraction form
   1,345.61/1,856.98 = 756.19/x
3. Step 3: Cross multiply
   1,345.61x = 1,856.98 × 756.19
4. Step 4: Simplify right side
   1,345.61x = 1,404,229.71
5. Step 5: Solve for x
   x = 1,404,229.71/1,345.61
6. Step 6: Final answer
   x = 1,043.56