Finding the Fourth Proportional to 510,864.43, 766,389.59 and 211,182.25

Step by Step Solution

1. Step 1: Write the proportion equation
   510,864.43 : 766,389.59 = 211,182.25 : x
2. Step 2: Convert to fraction form
   510,864.43/766,389.59 = 211,182.25/x
3. Step 3: Cross multiply
   510,864.43x = 766,389.59 × 211,182.25
4. Step 4: Simplify right side
   510,864.43x = 161,847,877,992.78
5. Step 5: Solve for x
   x = 161,847,877,992.78/510,864.43
6. Step 6: Final answer
   x = 316,811.80