Finding the Fourth Proportional to 678,012, 935,594.71 and 402,322.34

Step by Step Solution

1. Step 1: Write the proportion equation
   678,012 : 935,594.71 = 402,322.34 : x
2. Step 2: Convert to fraction form
   678,012/935,594.71 = 402,322.34/x
3. Step 3: Cross multiply
   678,012x = 935,594.71 × 402,322.34
4. Step 4: Simplify right side
   678,012x = 376,410,653,018.82
5. Step 5: Solve for x
   x = 376,410,653,018.82/678,012
6. Step 6: Final answer
   x = 555,168.13