Finding the Fourth Proportional to 42,129.90, 63,196.17 and 18,425.25

Step by Step Solution

1. Step 1: Write the proportion equation
   42,129.90 : 63,196.17 = 18,425.25 : x
2. Step 2: Convert to fraction form
   42,129.90/63,196.17 = 18,425.25/x
3. Step 3: Cross multiply
   42,129.90x = 63,196.17 × 18,425.25
4. Step 4: Simplify right side
   42,129.90x = 1,164,405,231.29
5. Step 5: Solve for x
   x = 1,164,405,231.29/42,129.90
6. Step 6: Final answer
   x = 27,638.45