Finding the Fourth Proportional to 663,300.10, 915,357.22 and 376,835.91

Step by Step Solution

1. Step 1: Write the proportion equation
   663,300.10 : 915,357.22 = 376,835.91 : x
2. Step 2: Convert to fraction form
   663,300.10/915,357.22 = 376,835.91/x
3. Step 3: Cross multiply
   663,300.10x = 915,357.22 × 376,835.91
4. Step 4: Simplify right side
   663,300.10x = 344,939,470,973.77
5. Step 5: Solve for x
   x = 344,939,470,973.77/663,300.10
6. Step 6: Final answer
   x = 520,035.31