Finding the Fourth Proportional to 9,978.06, 13,768.64 and 5,501.52

Step by Step Solution

1. Step 1: Write the proportion equation
   9,978.06 : 13,768.64 = 5,501.52 : x
2. Step 2: Convert to fraction form
   9,978.06/13,768.64 = 5,501.52/x
3. Step 3: Cross multiply
   9,978.06x = 13,768.64 × 5,501.52
4. Step 4: Simplify right side
   9,978.06x = 75,748,448.33
5. Step 5: Solve for x
   x = 75,748,448.33/9,978.06
6. Step 6: Final answer
   x = 7,591.50