Finding the Fourth Proportional to 14,667.51, 21,978.62 and 9,905.00

Step by Step Solution

1. Step 1: Write the proportion equation
   14,667.51 : 21,978.62 = 9,905.00 : x
2. Step 2: Convert to fraction form
   14,667.51/21,978.62 = 9,905.00/x
3. Step 3: Cross multiply
   14,667.51x = 21,978.62 × 9,905.00
4. Step 4: Simplify right side
   14,667.51x = 217,698,204.60
5. Step 5: Solve for x
   x = 217,698,204.60/14,667.51
6. Step 6: Final answer
   x = 14,842.21