Finding the Fourth Proportional to 9,919.72, 14,878.68 and 4,992.94

Step by Step Solution

1. Step 1: Write the proportion equation
   9,919.72 : 14,878.68 = 4,992.94 : x
2. Step 2: Convert to fraction form
   9,919.72/14,878.68 = 4,992.94/x
3. Step 3: Cross multiply
   9,919.72x = 14,878.68 × 4,992.94
4. Step 4: Simplify right side
   9,919.72x = 74,288,356.52
5. Step 5: Solve for x
   x = 74,288,356.52/9,919.72
6. Step 6: Final answer
   x = 7,488.96