Finding the Fourth Proportional to 42,127.16, 63,210.28 and 18,431.59

Step by Step Solution

1. Step 1: Write the proportion equation
   42,127.16 : 63,210.28 = 18,431.59 : x
2. Step 2: Convert to fraction form
   42,127.16/63,210.28 = 18,431.59/x
3. Step 3: Cross multiply
   42,127.16x = 63,210.28 × 18,431.59
4. Step 4: Simplify right side
   42,127.16x = 1,165,065,806.72
5. Step 5: Solve for x
   x = 1,165,065,806.72/42,127.16
6. Step 6: Final answer
   x = 27,655.93