Finding the Fourth Proportional to 681,146.91, 940,011.89 and 379,340.91

Step by Step Solution

1. Step 1: Write the proportion equation
   681,146.91 : 940,011.89 = 379,340.91 : x
2. Step 2: Convert to fraction form
   681,146.91/940,011.89 = 379,340.91/x
3. Step 3: Cross multiply
   681,146.91x = 940,011.89 × 379,340.91
4. Step 4: Simplify right side
   681,146.91x = 356,584,962,475.46
5. Step 5: Solve for x
   x = 356,584,962,475.46/681,146.91
6. Step 6: Final answer
   x = 523,506.69