Finding the Fourth Proportional to 9,978.17, 13,769.64 and 5,501.79

Step by Step Solution

1. Step 1: Write the proportion equation
   9,978.17 : 13,769.64 = 5,501.79 : x
2. Step 2: Convert to fraction form
   9,978.17/13,769.64 = 5,501.79/x
3. Step 3: Cross multiply
   9,978.17x = 13,769.64 × 5,501.79
4. Step 4: Simplify right side
   9,978.17x = 75,757,667.66
5. Step 5: Solve for x
   x = 75,757,667.66/9,978.17
6. Step 6: Final answer
   x = 7,592.34