Finding the Fourth Proportional to 13,131.25, 19,700.12 and 3,897.25

Step by Step Solution

1. Step 1: Write the proportion equation
   13,131.25 : 19,700.12 = 3,897.25 : x
2. Step 2: Convert to fraction form
   13,131.25/19,700.12 = 3,897.25/x
3. Step 3: Cross multiply
   13,131.25x = 19,700.12 × 3,897.25
4. Step 4: Simplify right side
   13,131.25x = 76,776,292.67
5. Step 5: Solve for x
   x = 76,776,292.67/13,131.25
6. Step 6: Final answer
   x = 5,846.84