Finding the Fourth Proportional to 31,156.08, 42,983.64 and 19,984.56

Step by Step Solution

1. Step 1: Write the proportion equation
   31,156.08 : 42,983.64 = 19,984.56 : x
2. Step 2: Convert to fraction form
   31,156.08/42,983.64 = 19,984.56/x
3. Step 3: Cross multiply
   31,156.08x = 42,983.64 × 19,984.56
4. Step 4: Simplify right side
   31,156.08x = 859,009,132.60
5. Step 5: Solve for x
   x = 859,009,132.60/31,156.08
6. Step 6: Final answer
   x = 27,571.16