Finding the Third Proportional to 91,059.75 and 137,860.50

Step by Step Solution

1. Step 1: Write the proportion equation
   91,059.75 : 137,860.50 = 137,860.50 : x
2. Step 2: Convert to fraction form
   91,059.75/137,860.50 = 137,860.50/x
3. Step 3: Cross multiply
   91,059.75x = 137,860.50 × 137,860.50
4. Step 4: Simplify right side
   91,059.75x = 19,005,517,460.25
5. Step 5: Solve for x
   x = 19,005,517,460.25/91,059.75
6. Step 6: Final answer
   x = 208,714.80