Finding the Fourth Proportional to 30,690.86, 42,357.42 and 22,755.69

Step by Step Solution

1. Step 1: Write the proportion equation
   30,690.86 : 42,357.42 = 22,755.69 : x
2. Step 2: Convert to fraction form
   30,690.86/42,357.42 = 22,755.69/x
3. Step 3: Cross multiply
   30,690.86x = 42,357.42 × 22,755.69
4. Step 4: Simplify right side
   30,690.86x = 963,872,318.72
5. Step 5: Solve for x
   x = 963,872,318.72/30,690.86
6. Step 6: Final answer
   x = 31,405.85