Finding the Fourth Proportional to 556,626.88, 768,145.37 and 301,978

Step by Step Solution

1. Step 1: Write the proportion equation
   556,626.88 : 768,145.37 = 301,978 : x
2. Step 2: Convert to fraction form
   556,626.88/768,145.37 = 301,978/x
3. Step 3: Cross multiply
   556,626.88x = 768,145.37 × 301,978
4. Step 4: Simplify right side
   556,626.88x = 231,963,002,541.86
5. Step 5: Solve for x
   x = 231,963,002,541.86/556,626.88
6. Step 6: Final answer
   x = 416,729.79