Finding the Fourth Proportional to 31,064.40, 42,845.74 and 19,724.06

Step by Step Solution

1. Step 1: Write the proportion equation
   31,064.40 : 42,845.74 = 19,724.06 : x
2. Step 2: Convert to fraction form
   31,064.40/42,845.74 = 19,724.06/x
3. Step 3: Cross multiply
   31,064.40x = 42,845.74 × 19,724.06
4. Step 4: Simplify right side
   31,064.40x = 845,091,946.50
5. Step 5: Solve for x
   x = 845,091,946.50/31,064.40
6. Step 6: Final answer
   x = 27,204.52