Finding the Fourth Proportional to 31,271.79, 43,154.55 and 16,931.50

Step by Step Solution

1. Step 1: Write the proportion equation
   31,271.79 : 43,154.55 = 16,931.50 : x
2. Step 2: Convert to fraction form
   31,271.79/43,154.55 = 16,931.50/x
3. Step 3: Cross multiply
   31,271.79x = 43,154.55 × 16,931.50
4. Step 4: Simplify right side
   31,271.79x = 730,671,328.88
5. Step 5: Solve for x
   x = 730,671,328.88/31,271.79
6. Step 6: Final answer
   x = 23,365.19