Finding the Fourth Proportional to 9,881.80, 13,636.55 and 5,900.55

Step by Step Solution

1. Step 1: Write the proportion equation
   9,881.80 : 13,636.55 = 5,900.55 : x
2. Step 2: Convert to fraction form
   9,881.80/13,636.55 = 5,900.55/x
3. Step 3: Cross multiply
   9,881.80x = 13,636.55 × 5,900.55
4. Step 4: Simplify right side
   9,881.80x = 80,463,108.72
5. Step 5: Solve for x
   x = 80,463,108.72/9,881.80
6. Step 6: Final answer
   x = 8,142.56