Finding the Third Proportional to 56,859 and 89,969

Step by Step Solution

1. Step 1: Write the proportion equation
   56,859 : 89,969 = 89,969 : x
2. Step 2: Convert to fraction form
   56,859/89,969 = 89,969/x
3. Step 3: Cross multiply
   56,859x = 89,969 × 89,969
4. Step 4: Simplify right side
   56,859x = 8,094,420,961
5. Step 5: Solve for x
   x = 8,094,420,961/56,859
6. Step 6: Final answer
   x = 142,359.54