Finding the Fourth Proportional to 42,272.60, 63,322.78 and 20,018.50

Step by Step Solution

1. Step 1: Write the proportion equation
   42,272.60 : 63,322.78 = 20,018.50 : x
2. Step 2: Convert to fraction form
   42,272.60/63,322.78 = 20,018.50/x
3. Step 3: Cross multiply
   42,272.60x = 63,322.78 × 20,018.50
4. Step 4: Simplify right side
   42,272.60x = 1,267,627,071.43
5. Step 5: Solve for x
   x = 1,267,627,071.43/42,272.60
6. Step 6: Final answer
   x = 29,986.97