Finding the Fourth Proportional to 377,105.25, 520,385.98 and 207,306.57

Step by Step Solution

1. Step 1: Write the proportion equation
   377,105.25 : 520,385.98 = 207,306.57 : x
2. Step 2: Convert to fraction form
   377,105.25/520,385.98 = 207,306.57/x
3. Step 3: Cross multiply
   377,105.25x = 520,385.98 × 207,306.57
4. Step 4: Simplify right side
   377,105.25x = 107,879,432,589.89
5. Step 5: Solve for x
   x = 107,879,432,589.89/377,105.25
6. Step 6: Final answer
   x = 286,072.48