Finding the Third Proportional to 58,288.50 and 90,009

Step by Step Solution

1. Step 1: Write the proportion equation
   58,288.50 : 90,009 = 90,009 : x
2. Step 2: Convert to fraction form
   58,288.50/90,009 = 90,009/x
3. Step 3: Cross multiply
   58,288.50x = 90,009 × 90,009
4. Step 4: Simplify right side
   58,288.50x = 8,101,620,081
5. Step 5: Solve for x
   x = 8,101,620,081/58,288.50
6. Step 6: Final answer
   x = 138,991.74