Finding the Fourth Proportional to 31,158.50, 42,986.43 and 19,201.01

Step by Step Solution

1. Step 1: Write the proportion equation
   31,158.50 : 42,986.43 = 19,201.01 : x
2. Step 2: Convert to fraction form
   31,158.50/42,986.43 = 19,201.01/x
3. Step 3: Cross multiply
   31,158.50x = 42,986.43 × 19,201.01
4. Step 4: Simplify right side
   31,158.50x = 825,382,657.36
5. Step 5: Solve for x
   x = 825,382,657.36/31,158.50
6. Step 6: Final answer
   x = 26,489.81