Finding the Fourth Proportional to 9,106.80, 12,567.43 and 5,127.98

Step by Step Solution

1. Step 1: Write the proportion equation
   9,106.80 : 12,567.43 = 5,127.98 : x
2. Step 2: Convert to fraction form
   9,106.80/12,567.43 = 5,127.98/x
3. Step 3: Cross multiply
   9,106.80x = 12,567.43 × 5,127.98
4. Step 4: Simplify right side
   9,106.80x = 64,445,564.88
5. Step 5: Solve for x
   x = 64,445,564.88/9,106.80
6. Step 6: Final answer
   x = 7,076.64