Finding the Fourth Proportional to 214,469.10, 321,705.96 and 64,710.72

Step by Step Solution

1. Step 1: Write the proportion equation
   214,469.10 : 321,705.96 = 64,710.72 : x
2. Step 2: Convert to fraction form
   214,469.10/321,705.96 = 64,710.72/x
3. Step 3: Cross multiply
   214,469.10x = 321,705.96 × 64,710.72
4. Step 4: Simplify right side
   214,469.10x = 20,817,824,299.89
5. Step 5: Solve for x
   x = 20,817,824,299.89/214,469.10
6. Step 6: Final answer
   x = 97,066.78