Finding the Third Proportional to 56,978 and 88,454

Step by Step Solution

1. Step 1: Write the proportion equation
   56,978 : 88,454 = 88,454 : x
2. Step 2: Convert to fraction form
   56,978/88,454 = 88,454/x
3. Step 3: Cross multiply
   56,978x = 88,454 × 88,454
4. Step 4: Simplify right side
   56,978x = 7,824,110,116
5. Step 5: Solve for x
   x = 7,824,110,116/56,978
6. Step 6: Final answer
   x = 137,318.09