Finding the Fourth Proportional to 30,686.77, 42,348.18 and 18,111.52

Step by Step Solution

1. Step 1: Write the proportion equation
   30,686.77 : 42,348.18 = 18,111.52 : x
2. Step 2: Convert to fraction form
   30,686.77/42,348.18 = 18,111.52/x
3. Step 3: Cross multiply
   30,686.77x = 42,348.18 × 18,111.52
4. Step 4: Simplify right side
   30,686.77x = 766,989,909.03
5. Step 5: Solve for x
   x = 766,989,909.03/30,686.77
6. Step 6: Final answer
   x = 24,994.16