Finding the Third Proportional to 100,858.50 and 137,043.50

Step by Step Solution

1. Step 1: Write the proportion equation
   100,858.50 : 137,043.50 = 137,043.50 : x
2. Step 2: Convert to fraction form
   100,858.50/137,043.50 = 137,043.50/x
3. Step 3: Cross multiply
   100,858.50x = 137,043.50 × 137,043.50
4. Step 4: Simplify right side
   100,858.50x = 18,780,920,892.25
5. Step 5: Solve for x
   x = 18,780,920,892.25/100,858.50
6. Step 6: Final answer
   x = 186,210.59