Finding the Third Proportional to 40,428.50 and 87,924.50

Step by Step Solution

1. Step 1: Write the proportion equation
   40,428.50 : 87,924.50 = 87,924.50 : x
2. Step 2: Convert to fraction form
   40,428.50/87,924.50 = 87,924.50/x
3. Step 3: Cross multiply
   40,428.50x = 87,924.50 × 87,924.50
4. Step 4: Simplify right side
   40,428.50x = 7,730,717,700.25
5. Step 5: Solve for x
   x = 7,730,717,700.25/40,428.50
6. Step 6: Final answer
   x = 191,219.50