Finding the Fourth Proportional to 1,404.20, 1,938.83 and 907.13

Step by Step Solution

1. Step 1: Write the proportion equation
   1,404.20 : 1,938.83 = 907.13 : x
2. Step 2: Convert to fraction form
   1,404.20/1,938.83 = 907.13/x
3. Step 3: Cross multiply
   1,404.20x = 1,938.83 × 907.13
4. Step 4: Simplify right side
   1,404.20x = 1,758,770.86
5. Step 5: Solve for x
   x = 1,758,770.86/1,404.20
6. Step 6: Final answer
   x = 1,252.51