Finding the Third Proportional to 59,980.50 and 89,638.50

Step by Step Solution

1. Step 1: Write the proportion equation
   59,980.50 : 89,638.50 = 89,638.50 : x
2. Step 2: Convert to fraction form
   59,980.50/89,638.50 = 89,638.50/x
3. Step 3: Cross multiply
   59,980.50x = 89,638.50 × 89,638.50
4. Step 4: Simplify right side
   59,980.50x = 8,035,060,682.25
5. Step 5: Solve for x
   x = 8,035,060,682.25/59,980.50
6. Step 6: Final answer
   x = 133,961.22