Finding the Fourth Proportional to 9,899.33, 14,845.82 and 5,216.72

Step by Step Solution

1. Step 1: Write the proportion equation
   9,899.33 : 14,845.82 = 5,216.72 : x
2. Step 2: Convert to fraction form
   9,899.33/14,845.82 = 5,216.72/x
3. Step 3: Cross multiply
   9,899.33x = 14,845.82 × 5,216.72
4. Step 4: Simplify right side
   9,899.33x = 77,446,385.80
5. Step 5: Solve for x
   x = 77,446,385.80/9,899.33
6. Step 6: Final answer
   x = 7,823.40