Finding the Fourth Proportional to 19,667.66, 29,480.47 and 7,805

Step by Step Solution

1. Step 1: Write the proportion equation
   19,667.66 : 29,480.47 = 7,805 : x
2. Step 2: Convert to fraction form
   19,667.66/29,480.47 = 7,805/x
3. Step 3: Cross multiply
   19,667.66x = 29,480.47 × 7,805
4. Step 4: Simplify right side
   19,667.66x = 230,095,068.35
5. Step 5: Solve for x
   x = 230,095,068.35/19,667.66
6. Step 6: Final answer
   x = 11,699.16