Finding the Third Proportional to 58,124 and 89,815

Step by Step Solution

1. Step 1: Write the proportion equation
   58,124 : 89,815 = 89,815 : x
2. Step 2: Convert to fraction form
   58,124/89,815 = 89,815/x
3. Step 3: Cross multiply
   58,124x = 89,815 × 89,815
4. Step 4: Simplify right side
   58,124x = 8,066,734,225
5. Step 5: Solve for x
   x = 8,066,734,225/58,124
6. Step 6: Final answer
   x = 138,784.91