Finding the Fourth Proportional to 1,939.72, 2,907.56 and 898.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,939.72 : 2,907.56 = 898.86 : x
2. Step 2: Convert to fraction form
   1,939.72/2,907.56 = 898.86/x
3. Step 3: Cross multiply
   1,939.72x = 2,907.56 × 898.86
4. Step 4: Simplify right side
   1,939.72x = 2,613,494.25
5. Step 5: Solve for x
   x = 2,613,494.25/1,939.72
6. Step 6: Final answer
   x = 1,347.36