Finding the Third Proportional to 56,870 and 90,857

Step by Step Solution

1. Step 1: Write the proportion equation
   56,870 : 90,857 = 90,857 : x
2. Step 2: Convert to fraction form
   56,870/90,857 = 90,857/x
3. Step 3: Cross multiply
   56,870x = 90,857 × 90,857
4. Step 4: Simplify right side
   56,870x = 8,254,994,449
5. Step 5: Solve for x
   x = 8,254,994,449/56,870
6. Step 6: Final answer
   x = 145,155.52