Finding the Fourth Proportional to 31,074.72, 42,886.10 and 19,145.04

Step by Step Solution

1. Step 1: Write the proportion equation
   31,074.72 : 42,886.10 = 19,145.04 : x
2. Step 2: Convert to fraction form
   31,074.72/42,886.10 = 19,145.04/x
3. Step 3: Cross multiply
   31,074.72x = 42,886.10 × 19,145.04
4. Step 4: Simplify right side
   31,074.72x = 821,056,099.94
5. Step 5: Solve for x
   x = 821,056,099.94/31,074.72
6. Step 6: Final answer
   x = 26,422.00