Finding the Fourth Proportional to 31,069.04, 42,875.76 and 16,921.87

Step by Step Solution

1. Step 1: Write the proportion equation
   31,069.04 : 42,875.76 = 16,921.87 : x
2. Step 2: Convert to fraction form
   31,069.04/42,875.76 = 16,921.87/x
3. Step 3: Cross multiply
   31,069.04x = 42,875.76 × 16,921.87
4. Step 4: Simplify right side
   31,069.04x = 725,538,036.87
5. Step 5: Solve for x
   x = 725,538,036.87/31,069.04
6. Step 6: Final answer
   x = 23,352.44