Finding the Third Proportional to 55,072 and 87,528.50

Step by Step Solution

1. Step 1: Write the proportion equation
   55,072 : 87,528.50 = 87,528.50 : x
2. Step 2: Convert to fraction form
   55,072/87,528.50 = 87,528.50/x
3. Step 3: Cross multiply
   55,072x = 87,528.50 × 87,528.50
4. Step 4: Simplify right side
   55,072x = 7,661,238,312.25
5. Step 5: Solve for x
   x = 7,661,238,312.25/55,072
6. Step 6: Final answer
   x = 139,113.13