Finding the Fourth Proportional to 30,887.60, 42,599.52 and 18,942.53

Step by Step Solution

1. Step 1: Write the proportion equation
   30,887.60 : 42,599.52 = 18,942.53 : x
2. Step 2: Convert to fraction form
   30,887.60/42,599.52 = 18,942.53/x
3. Step 3: Cross multiply
   30,887.60x = 42,599.52 × 18,942.53
4. Step 4: Simplify right side
   30,887.60x = 806,942,472.59
5. Step 5: Solve for x
   x = 806,942,472.59/30,887.60
6. Step 6: Final answer
   x = 26,125.13