Finding the Third Proportional to 91,176 and 137,978

Step by Step Solution

1. Step 1: Write the proportion equation
   91,176 : 137,978 = 137,978 : x
2. Step 2: Convert to fraction form
   91,176/137,978 = 137,978/x
3. Step 3: Cross multiply
   91,176x = 137,978 × 137,978
4. Step 4: Simplify right side
   91,176x = 19,037,928,484
5. Step 5: Solve for x
   x = 19,037,928,484/91,176
6. Step 6: Final answer
   x = 208,804.16