Finding the Fourth Proportional to 83,171.34, 114,641.46 and 64,990.26

Step by Step Solution

1. Step 1: Write the proportion equation
   83,171.34 : 114,641.46 = 64,990.26 : x
2. Step 2: Convert to fraction form
   83,171.34/114,641.46 = 64,990.26/x
3. Step 3: Cross multiply
   83,171.34x = 114,641.46 × 64,990.26
4. Step 4: Simplify right side
   83,171.34x = 7,450,578,292.18
5. Step 5: Solve for x
   x = 7,450,578,292.18/83,171.34
6. Step 6: Final answer
   x = 89,581.08