Finding the Fourth Proportional to 166,990, 250,499.58 and 42,331

Step by Step Solution

1. Step 1: Write the proportion equation
   166,990 : 250,499.58 = 42,331 : x
2. Step 2: Convert to fraction form
   166,990/250,499.58 = 42,331/x
3. Step 3: Cross multiply
   166,990x = 250,499.58 × 42,331
4. Step 4: Simplify right side
   166,990x = 10,603,897,720.98
5. Step 5: Solve for x
   x = 10,603,897,720.98/166,990
6. Step 6: Final answer
   x = 63,500.20