Finding the Fourth Proportional to 377,498.48, 520,970.35 and 216,363.89

Step by Step Solution

1. Step 1: Write the proportion equation
   377,498.48 : 520,970.35 = 216,363.89 : x
2. Step 2: Convert to fraction form
   377,498.48/520,970.35 = 216,363.89/x
3. Step 3: Cross multiply
   377,498.48x = 520,970.35 × 216,363.89
4. Step 4: Simplify right side
   377,498.48x = 112,719,171,500.66
5. Step 5: Solve for x
   x = 112,719,171,500.66/377,498.48
6. Step 6: Final answer
   x = 298,595.03