Finding the Third Proportional to 86,521.50 and 191,830.50

Step by Step Solution

1. Step 1: Write the proportion equation
   86,521.50 : 191,830.50 = 191,830.50 : x
2. Step 2: Convert to fraction form
   86,521.50/191,830.50 = 191,830.50/x
3. Step 3: Cross multiply
   86,521.50x = 191,830.50 × 191,830.50
4. Step 4: Simplify right side
   86,521.50x = 36,798,940,730.25
5. Step 5: Solve for x
   x = 36,798,940,730.25/86,521.50
6. Step 6: Final answer
   x = 425,315.57