Finding the Third Proportional to 76,886.72 and 103,438.27

Step by Step Solution

1. Step 1: Write the proportion equation
   76,886.72 : 103,438.27 = 103,438.27 : x
2. Step 2: Convert to fraction form
   76,886.72/103,438.27 = 103,438.27/x
3. Step 3: Cross multiply
   76,886.72x = 103,438.27 × 103,438.27
4. Step 4: Simplify right side
   76,886.72x = 10,699,474,795.51
5. Step 5: Solve for x
   x = 10,699,474,795.51/76,886.72
6. Step 6: Final answer
   x = 139,158.95