Finding the Fourth Proportional to 31,155.94, 42,985.84 and 18,410.29

Step by Step Solution

1. Step 1: Write the proportion equation
   31,155.94 : 42,985.84 = 18,410.29 : x
2. Step 2: Convert to fraction form
   31,155.94/42,985.84 = 18,410.29/x
3. Step 3: Cross multiply
   31,155.94x = 42,985.84 × 18,410.29
4. Step 4: Simplify right side
   31,155.94x = 791,381,661.32
5. Step 5: Solve for x
   x = 791,381,661.32/31,155.94
6. Step 6: Final answer
   x = 25,400.67