Finding the Fourth Proportional to 31,209.30, 43,072.77 and 17,779.86

Step by Step Solution

1. Step 1: Write the proportion equation
   31,209.30 : 43,072.77 = 17,779.86 : x
2. Step 2: Convert to fraction form
   31,209.30/43,072.77 = 17,779.86/x
3. Step 3: Cross multiply
   31,209.30x = 43,072.77 × 17,779.86
4. Step 4: Simplify right side
   31,209.30x = 765,827,820.41
5. Step 5: Solve for x
   x = 765,827,820.41/31,209.30
6. Step 6: Final answer
   x = 24,538.45