Finding the Third Proportional to 87,120 and 190,840.50

Step by Step Solution

1. Step 1: Write the proportion equation
   87,120 : 190,840.50 = 190,840.50 : x
2. Step 2: Convert to fraction form
   87,120/190,840.50 = 190,840.50/x
3. Step 3: Cross multiply
   87,120x = 190,840.50 × 190,840.50
4. Step 4: Simplify right side
   87,120x = 36,420,096,440.25
5. Step 5: Solve for x
   x = 36,420,096,440.25/87,120
6. Step 6: Final answer
   x = 418,045.18