Finding the Third Proportional to 87,300 and 138,451.50

Step by Step Solution

1. Step 1: Write the proportion equation
   87,300 : 138,451.50 = 138,451.50 : x
2. Step 2: Convert to fraction form
   87,300/138,451.50 = 138,451.50/x
3. Step 3: Cross multiply
   87,300x = 138,451.50 × 138,451.50
4. Step 4: Simplify right side
   87,300x = 19,168,817,852.25
5. Step 5: Solve for x
   x = 19,168,817,852.25/87,300
6. Step 6: Final answer
   x = 219,574.09