Finding the Fourth Proportional to 42,357.84, 63,520.56 and 20,154.12

Step by Step Solution

1. Step 1: Write the proportion equation
   42,357.84 : 63,520.56 = 20,154.12 : x
2. Step 2: Convert to fraction form
   42,357.84/63,520.56 = 20,154.12/x
3. Step 3: Cross multiply
   42,357.84x = 63,520.56 × 20,154.12
4. Step 4: Simplify right side
   42,357.84x = 1,280,200,988.71
5. Step 5: Solve for x
   x = 1,280,200,988.71/42,357.84
6. Step 6: Final answer
   x = 30,223.47