Finding the Fourth Proportional to 2,878.32, 4,317.57 and 930.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,878.32 : 4,317.57 = 930.72 : x
2. Step 2: Convert to fraction form
   2,878.32/4,317.57 = 930.72/x
3. Step 3: Cross multiply
   2,878.32x = 4,317.57 × 930.72
4. Step 4: Simplify right side
   2,878.32x = 4,018,448.75
5. Step 5: Solve for x
   x = 4,018,448.75/2,878.32
6. Step 6: Final answer
   x = 1,396.11