Finding the Third Proportional to 90,061.88 and 139,466.81

Step by Step Solution

1. Step 1: Write the proportion equation
   90,061.88 : 139,466.81 = 139,466.81 : x
2. Step 2: Convert to fraction form
   90,061.88/139,466.81 = 139,466.81/x
3. Step 3: Cross multiply
   90,061.88x = 139,466.81 × 139,466.81
4. Step 4: Simplify right side
   90,061.88x = 19,450,991,788.91
5. Step 5: Solve for x
   x = 19,450,991,788.91/90,061.88
6. Step 6: Final answer
   x = 215,973.65