Finding the Fourth Proportional to 10,387.98, 15,588.45 and 4,147.07

Step by Step Solution

1. Step 1: Write the proportion equation
   10,387.98 : 15,588.45 = 4,147.07 : x
2. Step 2: Convert to fraction form
   10,387.98/15,588.45 = 4,147.07/x
3. Step 3: Cross multiply
   10,387.98x = 15,588.45 × 4,147.07
4. Step 4: Simplify right side
   10,387.98x = 64,646,315.40
5. Step 5: Solve for x
   x = 64,646,315.40/10,387.98
6. Step 6: Final answer
   x = 6,223.18