Finding the Fourth Proportional to 9,909.16, 14,776.39 and 9,820.33

Step by Step Solution

1. Step 1: Write the proportion equation
   9,909.16 : 14,776.39 = 9,820.33 : x
2. Step 2: Convert to fraction form
   9,909.16/14,776.39 = 9,820.33/x
3. Step 3: Cross multiply
   9,909.16x = 14,776.39 × 9,820.33
4. Step 4: Simplify right side
   9,909.16x = 145,109,026.01
5. Step 5: Solve for x
   x = 145,109,026.01/9,909.16
6. Step 6: Final answer
   x = 14,643.93