Finding the Fourth Proportional to 483,054.53, 723,775.43 and 212,780.00

Step by Step Solution

1. Step 1: Write the proportion equation
   483,054.53 : 723,775.43 = 212,780.00 : x
2. Step 2: Convert to fraction form
   483,054.53/723,775.43 = 212,780.00/x
3. Step 3: Cross multiply
   483,054.53x = 723,775.43 × 212,780.00
4. Step 4: Simplify right side
   483,054.53x = 154,004,931,312.62
5. Step 5: Solve for x
   x = 154,004,931,312.62/483,054.53
6. Step 6: Final answer
   x = 318,814.80