Finding the Fourth Proportional to 30,878.99, 42,613.16 and 16,731.83

Step by Step Solution

1. Step 1: Write the proportion equation
   30,878.99 : 42,613.16 = 16,731.83 : x
2. Step 2: Convert to fraction form
   30,878.99/42,613.16 = 16,731.83/x
3. Step 3: Cross multiply
   30,878.99x = 42,613.16 × 16,731.83
4. Step 4: Simplify right side
   30,878.99x = 712,996,065.22
5. Step 5: Solve for x
   x = 712,996,065.22/30,878.99
6. Step 6: Final answer
   x = 23,090.01