Finding the Fourth Proportional to 42,492.91, 63,739.32 and 20,238.82

Step by Step Solution

1. Step 1: Write the proportion equation
   42,492.91 : 63,739.32 = 20,238.82 : x
2. Step 2: Convert to fraction form
   42,492.91/63,739.32 = 20,238.82/x
3. Step 3: Cross multiply
   42,492.91x = 63,739.32 × 20,238.82
4. Step 4: Simplify right side
   42,492.91x = 1,290,008,624.40
5. Step 5: Solve for x
   x = 1,290,008,624.40/42,492.91
6. Step 6: Final answer
   x = 30,358.21