Finding the Third Proportional to 222,088.50 and 316,521

Step by Step Solution

1. Step 1: Write the proportion equation
   222,088.50 : 316,521 = 316,521 : x
2. Step 2: Convert to fraction form
   222,088.50/316,521 = 316,521/x
3. Step 3: Cross multiply
   222,088.50x = 316,521 × 316,521
4. Step 4: Simplify right side
   222,088.50x = 100,185,543,441
5. Step 5: Solve for x
   x = 100,185,543,441/222,088.50
6. Step 6: Final answer
   x = 451,106.40