Finding the Fourth Proportional to 42,330.56, 63,476.61 and 20,170.72

Step by Step Solution

1. Step 1: Write the proportion equation
   42,330.56 : 63,476.61 = 20,170.72 : x
2. Step 2: Convert to fraction form
   42,330.56/63,476.61 = 20,170.72/x
3. Step 3: Cross multiply
   42,330.56x = 63,476.61 × 20,170.72
4. Step 4: Simplify right side
   42,330.56x = 1,280,368,926.86
5. Step 5: Solve for x
   x = 1,280,368,926.86/42,330.56
6. Step 6: Final answer
   x = 30,246.92