Finding the Fourth Proportional to 639,256.46, 882,123.72 and 381,113.91

Step by Step Solution

1. Step 1: Write the proportion equation
   639,256.46 : 882,123.72 = 381,113.91 : x
2. Step 2: Convert to fraction form
   639,256.46/882,123.72 = 381,113.91/x
3. Step 3: Cross multiply
   639,256.46x = 882,123.72 × 381,113.91
4. Step 4: Simplify right side
   639,256.46x = 336,189,618,603.77
5. Step 5: Solve for x
   x = 336,189,618,603.77/639,256.46
6. Step 6: Final answer
   x = 525,907.27