Finding the Fourth Proportional to 71,796.72, 107,663.79 and 21,865.08

Step by Step Solution

1. Step 1: Write the proportion equation
   71,796.72 : 107,663.79 = 21,865.08 : x
2. Step 2: Convert to fraction form
   71,796.72/107,663.79 = 21,865.08/x
3. Step 3: Cross multiply
   71,796.72x = 107,663.79 × 21,865.08
4. Step 4: Simplify right side
   71,796.72x = 2,354,077,381.45
5. Step 5: Solve for x
   x = 2,354,077,381.45/71,796.72
6. Step 6: Final answer
   x = 32,788.09