Finding the Fourth Proportional to 31,055.06, 42,856.08 and 18,479

Step by Step Solution

1. Step 1: Write the proportion equation
   31,055.06 : 42,856.08 = 18,479 : x
2. Step 2: Convert to fraction form
   31,055.06/42,856.08 = 18,479/x
3. Step 3: Cross multiply
   31,055.06x = 42,856.08 × 18,479
4. Step 4: Simplify right side
   31,055.06x = 791,937,502.32
5. Step 5: Solve for x
   x = 791,937,502.32/31,055.06
6. Step 6: Final answer
   x = 25,501.08