Finding the Fourth Proportional to 1,345.95, 1,857.20 and 756.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,345.95 : 1,857.20 = 756.47 : x
2. Step 2: Convert to fraction form
   1,345.95/1,857.20 = 756.47/x
3. Step 3: Cross multiply
   1,345.95x = 1,857.20 × 756.47
4. Step 4: Simplify right side
   1,345.95x = 1,404,916.94
5. Step 5: Solve for x
   x = 1,404,916.94/1,345.95
6. Step 6: Final answer
   x = 1,043.81