Finding the Third Proportional to 56,807 and 87,870

Step by Step Solution

1. Step 1: Write the proportion equation
   56,807 : 87,870 = 87,870 : x
2. Step 2: Convert to fraction form
   56,807/87,870 = 87,870/x
3. Step 3: Cross multiply
   56,807x = 87,870 × 87,870
4. Step 4: Simplify right side
   56,807x = 7,721,136,900
5. Step 5: Solve for x
   x = 7,721,136,900/56,807
6. Step 6: Final answer
   x = 135,918.76