Finding the Fourth Proportional to 677,945.78, 935,333.45 and 387,348.84

Step by Step Solution

1. Step 1: Write the proportion equation
   677,945.78 : 935,333.45 = 387,348.84 : x
2. Step 2: Convert to fraction form
   677,945.78/935,333.45 = 387,348.84/x
3. Step 3: Cross multiply
   677,945.78x = 935,333.45 × 387,348.84
4. Step 4: Simplify right side
   677,945.78x = 362,300,326,870.70
5. Step 5: Solve for x
   x = 362,300,326,870.70/677,945.78
6. Step 6: Final answer
   x = 534,409.00