Finding the Fourth Proportional to 30,962.06, 42,738.54 and 18,386.72

Step by Step Solution

1. Step 1: Write the proportion equation
   30,962.06 : 42,738.54 = 18,386.72 : x
2. Step 2: Convert to fraction form
   30,962.06/42,738.54 = 18,386.72/x
3. Step 3: Cross multiply
   30,962.06x = 42,738.54 × 18,386.72
4. Step 4: Simplify right side
   30,962.06x = 785,821,549.24
5. Step 5: Solve for x
   x = 785,821,549.24/30,962.06
6. Step 6: Final answer
   x = 25,380.15