Finding the Fourth Proportional to 619,978.32, 929,101.35 and 335,054.61

Step by Step Solution

1. Step 1: Write the proportion equation
   619,978.32 : 929,101.35 = 335,054.61 : x
2. Step 2: Convert to fraction form
   619,978.32/929,101.35 = 335,054.61/x
3. Step 3: Cross multiply
   619,978.32x = 929,101.35 × 335,054.61
4. Step 4: Simplify right side
   619,978.32x = 311,299,690,474.72
5. Step 5: Solve for x
   x = 311,299,690,474.72/619,978.32
6. Step 6: Final answer
   x = 502,113.83