Finding the Third Proportional to 100,931 and 212,319.50

Step by Step Solution

1. Step 1: Write the proportion equation
   100,931 : 212,319.50 = 212,319.50 : x
2. Step 2: Convert to fraction form
   100,931/212,319.50 = 212,319.50/x
3. Step 3: Cross multiply
   100,931x = 212,319.50 × 212,319.50
4. Step 4: Simplify right side
   100,931x = 45,079,570,080.25
5. Step 5: Solve for x
   x = 45,079,570,080.25/100,931
6. Step 6: Final answer
   x = 446,637.51