Finding the Fourth Proportional to 555,389.28, 766,440.89 and 300,740.46

Step by Step Solution

1. Step 1: Write the proportion equation
   555,389.28 : 766,440.89 = 300,740.46 : x
2. Step 2: Convert to fraction form
   555,389.28/766,440.89 = 300,740.46/x
3. Step 3: Cross multiply
   555,389.28x = 766,440.89 × 300,740.46
4. Step 4: Simplify right side
   555,389.28x = 230,499,784,317.71
5. Step 5: Solve for x
   x = 230,499,784,317.71/555,389.28
6. Step 6: Final answer
   x = 415,023.83