Finding the Third Proportional to 31,878.56 and 69,816.94

Step by Step Solution

1. Step 1: Write the proportion equation
   31,878.56 : 69,816.94 = 69,816.94 : x
2. Step 2: Convert to fraction form
   31,878.56/69,816.94 = 69,816.94/x
3. Step 3: Cross multiply
   31,878.56x = 69,816.94 × 69,816.94
4. Step 4: Simplify right side
   31,878.56x = 4,874,404,761.88
5. Step 5: Solve for x
   x = 4,874,404,761.88/31,878.56
6. Step 6: Final answer
   x = 152,905.41