Finding the Third Proportional to 40,290.75 and 87,358.50

Step by Step Solution

1. Step 1: Write the proportion equation
   40,290.75 : 87,358.50 = 87,358.50 : x
2. Step 2: Convert to fraction form
   40,290.75/87,358.50 = 87,358.50/x
3. Step 3: Cross multiply
   40,290.75x = 87,358.50 × 87,358.50
4. Step 4: Simplify right side
   40,290.75x = 7,631,507,522.25
5. Step 5: Solve for x
   x = 7,631,507,522.25/40,290.75
6. Step 6: Final answer
   x = 189,410.91