Finding the Third Proportional to 51,135 and 78,487.50

Step by Step Solution

1. Step 1: Write the proportion equation
   51,135 : 78,487.50 = 78,487.50 : x
2. Step 2: Convert to fraction form
   51,135/78,487.50 = 78,487.50/x
3. Step 3: Cross multiply
   51,135x = 78,487.50 × 78,487.50
4. Step 4: Simplify right side
   51,135x = 6,160,287,656.25
5. Step 5: Solve for x
   x = 6,160,287,656.25/51,135
6. Step 6: Final answer
   x = 120,471.06