Finding the Fourth Proportional to 938.50, 1,404.51 and 906.10

Step by Step Solution

1. Step 1: Write the proportion equation
   938.50 : 1,404.51 = 906.10 : x
2. Step 2: Convert to fraction form
   938.50/1,404.51 = 906.10/x
3. Step 3: Cross multiply
   938.50x = 1,404.51 × 906.10
4. Step 4: Simplify right side
   938.50x = 1,272,626.51
5. Step 5: Solve for x
   x = 1,272,626.51/938.50
6. Step 6: Final answer
   x = 1,356.02