Finding the Third Proportional to 55,219.50 and 85,031.25

Step by Step Solution

1. Step 1: Write the proportion equation
   55,219.50 : 85,031.25 = 85,031.25 : x
2. Step 2: Convert to fraction form
   55,219.50/85,031.25 = 85,031.25/x
3. Step 3: Cross multiply
   55,219.50x = 85,031.25 × 85,031.25
4. Step 4: Simplify right side
   55,219.50x = 7,230,313,476.56
5. Step 5: Solve for x
   x = 7,230,313,476.56/55,219.50
6. Step 6: Final answer
   x = 130,937.68