Finding the Fourth Proportional to 2,978.07, 4,467.72 and 897.90

Step by Step Solution

1. Step 1: Write the proportion equation
   2,978.07 : 4,467.72 = 897.90 : x
2. Step 2: Convert to fraction form
   2,978.07/4,467.72 = 897.90/x
3. Step 3: Cross multiply
   2,978.07x = 4,467.72 × 897.90
4. Step 4: Simplify right side
   2,978.07x = 4,011,565.79
5. Step 5: Solve for x
   x = 4,011,565.79/2,978.07
6. Step 6: Final answer
   x = 1,347.04