Finding the Fourth Proportional to 71,664.33, 98,670.89 and 65,021.31

Step by Step Solution

1. Step 1: Write the proportion equation
   71,664.33 : 98,670.89 = 65,021.31 : x
2. Step 2: Convert to fraction form
   71,664.33/98,670.89 = 65,021.31/x
3. Step 3: Cross multiply
   71,664.33x = 98,670.89 × 65,021.31
4. Step 4: Simplify right side
   71,664.33x = 6,415,710,201.56
5. Step 5: Solve for x
   x = 6,415,710,201.56/71,664.33
6. Step 6: Final answer
   x = 89,524.46