Finding the Fourth Proportional to 31,056.87, 42,864.55 and 19,739.55

Step by Step Solution

1. Step 1: Write the proportion equation
   31,056.87 : 42,864.55 = 19,739.55 : x
2. Step 2: Convert to fraction form
   31,056.87/42,864.55 = 19,739.55/x
3. Step 3: Cross multiply
   31,056.87x = 42,864.55 × 19,739.55
4. Step 4: Simplify right side
   31,056.87x = 846,126,927.95
5. Step 5: Solve for x
   x = 846,126,927.95/31,056.87
6. Step 6: Final answer
   x = 27,244.44