Finding the Fourth Proportional to 42,274.71, 63,412.61 and 20,090.25

Step by Step Solution

1. Step 1: Write the proportion equation
   42,274.71 : 63,412.61 = 20,090.25 : x
2. Step 2: Convert to fraction form
   42,274.71/63,412.61 = 20,090.25/x
3. Step 3: Cross multiply
   42,274.71x = 63,412.61 × 20,090.25
4. Step 4: Simplify right side
   42,274.71x = 1,273,975,087.60
5. Step 5: Solve for x
   x = 1,273,975,087.60/42,274.71
6. Step 6: Final answer
   x = 30,135.63