Finding the Third Proportional to 49,781.88 and 78,865.75

Step by Step Solution

1. Step 1: Write the proportion equation
   49,781.88 : 78,865.75 = 78,865.75 : x
2. Step 2: Convert to fraction form
   49,781.88/78,865.75 = 78,865.75/x
3. Step 3: Cross multiply
   49,781.88x = 78,865.75 × 78,865.75
4. Step 4: Simplify right side
   49,781.88x = 6,219,806,523.06
5. Step 5: Solve for x
   x = 6,219,806,523.06/49,781.88
6. Step 6: Final answer
   x = 124,941.19