Finding the Third Proportional to 138,112.50 and 290,156.25

Step by Step Solution

1. Step 1: Write the proportion equation
   138,112.50 : 290,156.25 = 290,156.25 : x
2. Step 2: Convert to fraction form
   138,112.50/290,156.25 = 290,156.25/x
3. Step 3: Cross multiply
   138,112.50x = 290,156.25 × 290,156.25
4. Step 4: Simplify right side
   138,112.50x = 84,190,649,414.06
5. Step 5: Solve for x
   x = 84,190,649,414.06/138,112.50
6. Step 6: Final answer
   x = 609,580.23