Finding the Third Proportional to 56,831.50 and 89,159

Step by Step Solution

1. Step 1: Write the proportion equation
   56,831.50 : 89,159 = 89,159 : x
2. Step 2: Convert to fraction form
   56,831.50/89,159 = 89,159/x
3. Step 3: Cross multiply
   56,831.50x = 89,159 × 89,159
4. Step 4: Simplify right side
   56,831.50x = 7,949,327,281
5. Step 5: Solve for x
   x = 7,949,327,281/56,831.50
6. Step 6: Final answer
   x = 139,875.37