Finding the Fourth Proportional to 1,345.59, 1,857.74 and 903.87

Step by Step Solution

1. Step 1: Write the proportion equation
   1,345.59 : 1,857.74 = 903.87 : x
2. Step 2: Convert to fraction form
   1,345.59/1,857.74 = 903.87/x
3. Step 3: Cross multiply
   1,345.59x = 1,857.74 × 903.87
4. Step 4: Simplify right side
   1,345.59x = 1,679,150.93
5. Step 5: Solve for x
   x = 1,679,150.93/1,345.59
6. Step 6: Final answer
   x = 1,247.89