Finding the Fourth Proportional to 30,695.18, 42,378.82 and 21,020.83

Step by Step Solution

1. Step 1: Write the proportion equation
   30,695.18 : 42,378.82 = 21,020.83 : x
2. Step 2: Convert to fraction form
   30,695.18/42,378.82 = 21,020.83/x
3. Step 3: Cross multiply
   30,695.18x = 42,378.82 × 21,020.83
4. Step 4: Simplify right side
   30,695.18x = 890,837,970.82
5. Step 5: Solve for x
   x = 890,837,970.82/30,695.18
6. Step 6: Final answer
   x = 29,022.08