Finding the Third Proportional to 58,704.75 and 78,640.88

Step by Step Solution

1. Step 1: Write the proportion equation
   58,704.75 : 78,640.88 = 78,640.88 : x
2. Step 2: Convert to fraction form
   58,704.75/78,640.88 = 78,640.88/x
3. Step 3: Cross multiply
   58,704.75x = 78,640.88 × 78,640.88
4. Step 4: Simplify right side
   58,704.75x = 6,184,387,220.77
5. Step 5: Solve for x
   x = 6,184,387,220.77/58,704.75
6. Step 6: Final answer
   x = 105,347.31