Finding the Third Proportional to 60,878.50 and 91,070

Step by Step Solution

1. Step 1: Write the proportion equation
   60,878.50 : 91,070 = 91,070 : x
2. Step 2: Convert to fraction form
   60,878.50/91,070 = 91,070/x
3. Step 3: Cross multiply
   60,878.50x = 91,070 × 91,070
4. Step 4: Simplify right side
   60,878.50x = 8,293,744,900
5. Step 5: Solve for x
   x = 8,293,744,900/60,878.50
6. Step 6: Final answer
   x = 136,234.38