Finding the Fourth Proportional to 377,853, 521,429.22 and 208,088.52

Step by Step Solution

1. Step 1: Write the proportion equation
   377,853 : 521,429.22 = 208,088.52 : x
2. Step 2: Convert to fraction form
   377,853/521,429.22 = 208,088.52/x
3. Step 3: Cross multiply
   377,853x = 521,429.22 × 208,088.52
4. Step 4: Simplify right side
   377,853x = 108,503,434,674.55
5. Step 5: Solve for x
   x = 108,503,434,674.55/377,853
6. Step 6: Final answer
   x = 287,157.80