Finding the Fourth Proportional to 10,985.98, 15,185.57 and 10,114.08

Step by Step Solution

1. Step 1: Write the proportion equation
   10,985.98 : 15,185.57 = 10,114.08 : x
2. Step 2: Convert to fraction form
   10,985.98/15,185.57 = 10,114.08/x
3. Step 3: Cross multiply
   10,985.98x = 15,185.57 × 10,114.08
4. Step 4: Simplify right side
   10,985.98x = 153,588,069.83
5. Step 5: Solve for x
   x = 153,588,069.83/10,985.98
6. Step 6: Final answer
   x = 13,980.37