Finding the Fourth Proportional to 1,345.98, 1,857.35 and 903.81

Step by Step Solution

1. Step 1: Write the proportion equation
   1,345.98 : 1,857.35 = 903.81 : x
2. Step 2: Convert to fraction form
   1,345.98/1,857.35 = 903.81/x
3. Step 3: Cross multiply
   1,345.98x = 1,857.35 × 903.81
4. Step 4: Simplify right side
   1,345.98x = 1,678,691.50
5. Step 5: Solve for x
   x = 1,678,691.50/1,345.98
6. Step 6: Final answer
   x = 1,247.19