Finding the Fourth Proportional to 5,538.15, 7,772.85 and 5,538.15

Step by Step Solution

1. Step 1: Write the proportion equation
   5,538.15 : 7,772.85 = 5,538.15 : x
2. Step 2: Convert to fraction form
   5,538.15/7,772.85 = 5,538.15/x
3. Step 3: Cross multiply
   5,538.15x = 7,772.85 × 5,538.15
4. Step 4: Simplify right side
   5,538.15x = 43,047,209.23
5. Step 5: Solve for x
   x = 43,047,209.23/5,538.15
6. Step 6: Final answer
   x = 7,772.85