Finding the Third Proportional to 69,876.75 and 98,780.63

Step by Step Solution

1. Step 1: Write the proportion equation
   69,876.75 : 98,780.63 = 98,780.63 : x
2. Step 2: Convert to fraction form
   69,876.75/98,780.63 = 98,780.63/x
3. Step 3: Cross multiply
   69,876.75x = 98,780.63 × 98,780.63
4. Step 4: Simplify right side
   69,876.75x = 9,757,611,875.39
5. Step 5: Solve for x
   x = 9,757,611,875.39/69,876.75
6. Step 6: Final answer
   x = 139,640.32