Finding the Fourth Proportional to 9,871.18, 13,623.05 and 5,623.58

Step by Step Solution

1. Step 1: Write the proportion equation
   9,871.18 : 13,623.05 = 5,623.58 : x
2. Step 2: Convert to fraction form
   9,871.18/13,623.05 = 5,623.58/x
3. Step 3: Cross multiply
   9,871.18x = 13,623.05 × 5,623.58
4. Step 4: Simplify right side
   9,871.18x = 76,610,311.52
5. Step 5: Solve for x
   x = 76,610,311.52/9,871.18
6. Step 6: Final answer
   x = 7,761.01