Finding the Fourth Proportional to 9,980.81, 13,773.86 and 5,504.70

Step by Step Solution

1. Step 1: Write the proportion equation
   9,980.81 : 13,773.86 = 5,504.70 : x
2. Step 2: Convert to fraction form
   9,980.81/13,773.86 = 5,504.70/x
3. Step 3: Cross multiply
   9,980.81x = 13,773.86 × 5,504.70
4. Step 4: Simplify right side
   9,980.81x = 75,820,967.14
5. Step 5: Solve for x
   x = 75,820,967.14/9,980.81
6. Step 6: Final answer
   x = 7,596.67