Finding the Fourth Proportional to 1,345.07, 1,856.14 and 755.60

Step by Step Solution

1. Step 1: Write the proportion equation
   1,345.07 : 1,856.14 = 755.60 : x
2. Step 2: Convert to fraction form
   1,345.07/1,856.14 = 755.60/x
3. Step 3: Cross multiply
   1,345.07x = 1,856.14 × 755.60
4. Step 4: Simplify right side
   1,345.07x = 1,402,499.38
5. Step 5: Solve for x
   x = 1,402,499.38/1,345.07
6. Step 6: Final answer
   x = 1,042.70