Finding the Fourth Proportional to 31,768.61, 43,840.72 and 17,621.45

Step by Step Solution

1. Step 1: Write the proportion equation
   31,768.61 : 43,840.72 = 17,621.45 : x
2. Step 2: Convert to fraction form
   31,768.61/43,840.72 = 17,621.45/x
3. Step 3: Cross multiply
   31,768.61x = 43,840.72 × 17,621.45
4. Step 4: Simplify right side
   31,768.61x = 772,536,973.11
5. Step 5: Solve for x
   x = 772,536,973.11/31,768.61
6. Step 6: Final answer
   x = 24,317.62