Finding the Third Proportional to 51,510.50 and 77,987.50

Step by Step Solution

1. Step 1: Write the proportion equation
   51,510.50 : 77,987.50 = 77,987.50 : x
2. Step 2: Convert to fraction form
   51,510.50/77,987.50 = 77,987.50/x
3. Step 3: Cross multiply
   51,510.50x = 77,987.50 × 77,987.50
4. Step 4: Simplify right side
   51,510.50x = 6,082,050,156.25
5. Step 5: Solve for x
   x = 6,082,050,156.25/51,510.50
6. Step 6: Final answer
   x = 118,073.99