Finding the Third Proportional to 91,888.13 and 137,869.69

Step by Step Solution

1. Step 1: Write the proportion equation
   91,888.13 : 137,869.69 = 137,869.69 : x
2. Step 2: Convert to fraction form
   91,888.13/137,869.69 = 137,869.69/x
3. Step 3: Cross multiply
   91,888.13x = 137,869.69 × 137,869.69
4. Step 4: Simplify right side
   91,888.13x = 19,008,050,731.35
5. Step 5: Solve for x
   x = 19,008,050,731.35/91,888.13
6. Step 6: Final answer
   x = 206,860.80