Finding the Fourth Proportional to 1,407.56, 1,942.17 and 903.84

Step by Step Solution

1. Step 1: Write the proportion equation
   1,407.56 : 1,942.17 = 903.84 : x
2. Step 2: Convert to fraction form
   1,407.56/1,942.17 = 903.84/x
3. Step 3: Cross multiply
   1,407.56x = 1,942.17 × 903.84
4. Step 4: Simplify right side
   1,407.56x = 1,755,410.93
5. Step 5: Solve for x
   x = 1,755,410.93/1,407.56
6. Step 6: Final answer
   x = 1,247.13