Finding the Third Proportional to 81,138 and 118,567.50

Step by Step Solution

1. Step 1: Write the proportion equation
   81,138 : 118,567.50 = 118,567.50 : x
2. Step 2: Convert to fraction form
   81,138/118,567.50 = 118,567.50/x
3. Step 3: Cross multiply
   81,138x = 118,567.50 × 118,567.50
4. Step 4: Simplify right side
   81,138x = 14,058,252,056.25
5. Step 5: Solve for x
   x = 14,058,252,056.25/81,138
6. Step 6: Final answer
   x = 173,263.48