Finding the Fourth Proportional to 31,054.12, 42,829.76 and 20,298.13

Step by Step Solution

1. Step 1: Write the proportion equation
   31,054.12 : 42,829.76 = 20,298.13 : x
2. Step 2: Convert to fraction form
   31,054.12/42,829.76 = 20,298.13/x
3. Step 3: Cross multiply
   31,054.12x = 42,829.76 × 20,298.13
4. Step 4: Simplify right side
   31,054.12x = 869,363,980.02
5. Step 5: Solve for x
   x = 869,363,980.02/31,054.12
6. Step 6: Final answer
   x = 27,995.13