Finding the Fourth Proportional to 9,985.54, 13,780.74 and 5,737.27

Step by Step Solution

1. Step 1: Write the proportion equation
   9,985.54 : 13,780.74 = 5,737.27 : x
2. Step 2: Convert to fraction form
   9,985.54/13,780.74 = 5,737.27/x
3. Step 3: Cross multiply
   9,985.54x = 13,780.74 × 5,737.27
4. Step 4: Simplify right side
   9,985.54x = 79,063,826.18
5. Step 5: Solve for x
   x = 79,063,826.18/9,985.54
6. Step 6: Final answer
   x = 7,917.83