Finding the Fourth Proportional to 1,345.90, 1,857.46 and 756.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,345.90 : 1,857.46 = 756.58 : x
2. Step 2: Convert to fraction form
   1,345.90/1,857.46 = 756.58/x
3. Step 3: Cross multiply
   1,345.90x = 1,857.46 × 756.58
4. Step 4: Simplify right side
   1,345.90x = 1,405,317.09
5. Step 5: Solve for x
   x = 1,405,317.09/1,345.90
6. Step 6: Final answer
   x = 1,044.15