Finding the Fourth Proportional to 42,151.28, 63,172.42 and 31,538.03

Step by Step Solution

1. Step 1: Write the proportion equation
   42,151.28 : 63,172.42 = 31,538.03 : x
2. Step 2: Convert to fraction form
   42,151.28/63,172.42 = 31,538.03/x
3. Step 3: Cross multiply
   42,151.28x = 63,172.42 × 31,538.03
4. Step 4: Simplify right side
   42,151.28x = 1,992,333,756.22
5. Step 5: Solve for x
   x = 1,992,333,756.22/42,151.28
6. Step 6: Final answer
   x = 47,266.27