Finding the Third Proportional to 99,690.75 and 137,074.78

Step by Step Solution

1. Step 1: Write the proportion equation
   99,690.75 : 137,074.78 = 137,074.78 : x
2. Step 2: Convert to fraction form
   99,690.75/137,074.78 = 137,074.78/x
3. Step 3: Cross multiply
   99,690.75x = 137,074.78 × 137,074.78
4. Step 4: Simplify right side
   99,690.75x = 18,789,495,654.74
5. Step 5: Solve for x
   x = 18,789,495,654.74/99,690.75
6. Step 6: Final answer
   x = 188,477.82