Finding the Fourth Proportional to 1,345.58, 1,856.86 and 756.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,345.58 : 1,856.86 = 756.15 : x
2. Step 2: Convert to fraction form
   1,345.58/1,856.86 = 756.15/x
3. Step 3: Cross multiply
   1,345.58x = 1,856.86 × 756.15
4. Step 4: Simplify right side
   1,345.58x = 1,404,058.16
5. Step 5: Solve for x
   x = 1,404,058.16/1,345.58
6. Step 6: Final answer
   x = 1,043.46