Finding the Fourth Proportional to 9,981.60, 13,774.59 and 5,505.63

Step by Step Solution

1. Step 1: Write the proportion equation
   9,981.60 : 13,774.59 = 5,505.63 : x
2. Step 2: Convert to fraction form
   9,981.60/13,774.59 = 5,505.63/x
3. Step 3: Cross multiply
   9,981.60x = 13,774.59 × 5,505.63
4. Step 4: Simplify right side
   9,981.60x = 75,837,795.94
5. Step 5: Solve for x
   x = 75,837,795.94/9,981.60
6. Step 6: Final answer
   x = 7,597.76