Finding the Fourth Proportional to 9,898.42, 14,847.90 and 2,878.15

Step by Step Solution

1. Step 1: Write the proportion equation
   9,898.42 : 14,847.90 = 2,878.15 : x
2. Step 2: Convert to fraction form
   9,898.42/14,847.90 = 2,878.15/x
3. Step 3: Cross multiply
   9,898.42x = 14,847.90 × 2,878.15
4. Step 4: Simplify right side
   9,898.42x = 42,734,394.75
5. Step 5: Solve for x
   x = 42,734,394.75/9,898.42
6. Step 6: Final answer
   x = 4,317.30