Finding the Third Proportional to 211,107 and 315,607.50

Step by Step Solution

1. Step 1: Write the proportion equation
   211,107 : 315,607.50 = 315,607.50 : x
2. Step 2: Convert to fraction form
   211,107/315,607.50 = 315,607.50/x
3. Step 3: Cross multiply
   211,107x = 315,607.50 × 315,607.50
4. Step 4: Simplify right side
   211,107x = 99,608,094,056.25
5. Step 5: Solve for x
   x = 99,608,094,056.25/211,107
6. Step 6: Final answer
   x = 471,837.00