Finding the Fourth Proportional to 30,926.72, 42,678.96 and 16,779.53

Step by Step Solution

1. Step 1: Write the proportion equation
   30,926.72 : 42,678.96 = 16,779.53 : x
2. Step 2: Convert to fraction form
   30,926.72/42,678.96 = 16,779.53/x
3. Step 3: Cross multiply
   30,926.72x = 42,678.96 × 16,779.53
4. Step 4: Simplify right side
   30,926.72x = 716,132,889.69
5. Step 5: Solve for x
   x = 716,132,889.69/30,926.72
6. Step 6: Final answer
   x = 23,155.80