Finding the Third Proportional to 58,547.81 and 86,728.22

Step by Step Solution

1. Step 1: Write the proportion equation
   58,547.81 : 86,728.22 = 86,728.22 : x
2. Step 2: Convert to fraction form
   58,547.81/86,728.22 = 86,728.22/x
3. Step 3: Cross multiply
   58,547.81x = 86,728.22 × 86,728.22
4. Step 4: Simplify right side
   58,547.81x = 7,521,783,927.55
5. Step 5: Solve for x
   x = 7,521,783,927.55/58,547.81
6. Step 6: Final answer
   x = 128,472.50