Finding the Fourth Proportional to 30,688.86, 42,336.32 and 19,932.98

Step by Step Solution

1. Step 1: Write the proportion equation
   30,688.86 : 42,336.32 = 19,932.98 : x
2. Step 2: Convert to fraction form
   30,688.86/42,336.32 = 19,932.98/x
3. Step 3: Cross multiply
   30,688.86x = 42,336.32 × 19,932.98
4. Step 4: Simplify right side
   30,688.86x = 843,889,019.83
5. Step 5: Solve for x
   x = 843,889,019.83/30,688.86
6. Step 6: Final answer
   x = 27,498.22