Finding the Fourth Proportional to 20,783.16, 31,167.63 and 5,988.09

Step by Step Solution

1. Step 1: Write the proportion equation
   20,783.16 : 31,167.63 = 5,988.09 : x
2. Step 2: Convert to fraction form
   20,783.16/31,167.63 = 5,988.09/x
3. Step 3: Cross multiply
   20,783.16x = 31,167.63 × 5,988.09
4. Step 4: Simplify right side
   20,783.16x = 186,634,573.53
5. Step 5: Solve for x
   x = 186,634,573.53/20,783.16
6. Step 6: Final answer
   x = 8,980.09