Finding the Fourth Proportional to 39,861, 55,017.90 and 23,103.72

Step by Step Solution

1. Step 1: Write the proportion equation
   39,861 : 55,017.90 = 23,103.72 : x
2. Step 2: Convert to fraction form
   39,861/55,017.90 = 23,103.72/x
3. Step 3: Cross multiply
   39,861x = 55,017.90 × 23,103.72
4. Step 4: Simplify right side
   39,861x = 1,271,118,156.59
5. Step 5: Solve for x
   x = 1,271,118,156.59/39,861
6. Step 6: Final answer
   x = 31,888.77