Finding the Fourth Proportional to 42,479.04, 63,716.13 and 20,307.72

Step by Step Solution

1. Step 1: Write the proportion equation
   42,479.04 : 63,716.13 = 20,307.72 : x
2. Step 2: Convert to fraction form
   42,479.04/63,716.13 = 20,307.72/x
3. Step 3: Cross multiply
   42,479.04x = 63,716.13 × 20,307.72
4. Step 4: Simplify right side
   42,479.04x = 1,293,929,327.52
5. Step 5: Solve for x
   x = 1,293,929,327.52/42,479.04
6. Step 6: Final answer
   x = 30,460.42