Finding the Fourth Proportional to 31,036.20, 42,830.28 and 16,889.01

Step by Step Solution

1. Step 1: Write the proportion equation
   31,036.20 : 42,830.28 = 16,889.01 : x
2. Step 2: Convert to fraction form
   31,036.20/42,830.28 = 16,889.01/x
3. Step 3: Cross multiply
   31,036.20x = 42,830.28 × 16,889.01
4. Step 4: Simplify right side
   31,036.20x = 723,361,027.22
5. Step 5: Solve for x
   x = 723,361,027.22/31,036.20
6. Step 6: Final answer
   x = 23,307.01