Finding the Fourth Proportional to 377,632.86, 521,072.37 and 216,458.25

Step by Step Solution

1. Step 1: Write the proportion equation
   377,632.86 : 521,072.37 = 216,458.25 : x
2. Step 2: Convert to fraction form
   377,632.86/521,072.37 = 216,458.25/x
3. Step 3: Cross multiply
   377,632.86x = 521,072.37 × 216,458.25
4. Step 4: Simplify right side
   377,632.86x = 112,790,413,333.55
5. Step 5: Solve for x
   x = 112,790,413,333.55/377,632.86
6. Step 6: Final answer
   x = 298,677.43