Finding the Third Proportional to 101,979 and 218,719.50

Step by Step Solution

1. Step 1: Write the proportion equation
   101,979 : 218,719.50 = 218,719.50 : x
2. Step 2: Convert to fraction form
   101,979/218,719.50 = 218,719.50/x
3. Step 3: Cross multiply
   101,979x = 218,719.50 × 218,719.50
4. Step 4: Simplify right side
   101,979x = 47,838,219,680.25
5. Step 5: Solve for x
   x = 47,838,219,680.25/101,979
6. Step 6: Final answer
   x = 469,098.73