Finding the Fourth Proportional to 46,072.56, 69,108.72 and 18,390

Step by Step Solution

1. Step 1: Write the proportion equation
   46,072.56 : 69,108.72 = 18,390 : x
2. Step 2: Convert to fraction form
   46,072.56/69,108.72 = 18,390/x
3. Step 3: Cross multiply
   46,072.56x = 69,108.72 × 18,390
4. Step 4: Simplify right side
   46,072.56x = 1,270,909,360.80
5. Step 5: Solve for x
   x = 1,270,909,360.80/46,072.56
6. Step 6: Final answer
   x = 27,584.95