Finding the Fourth Proportional to 56,315.50, 77,717.82 and 31,165

Step by Step Solution

1. Step 1: Write the proportion equation
   56,315.50 : 77,717.82 = 31,165 : x
2. Step 2: Convert to fraction form
   56,315.50/77,717.82 = 31,165/x
3. Step 3: Cross multiply
   56,315.50x = 77,717.82 × 31,165
4. Step 4: Simplify right side
   56,315.50x = 2,422,075,860.30
5. Step 5: Solve for x
   x = 2,422,075,860.30/56,315.50
6. Step 6: Final answer
   x = 43,009.04