Finding the Fourth Proportional to 11,085.21, 15,312.51 and 10,297.89

Step by Step Solution

1. Step 1: Write the proportion equation
   11,085.21 : 15,312.51 = 10,297.89 : x
2. Step 2: Convert to fraction form
   11,085.21/15,312.51 = 10,297.89/x
3. Step 3: Cross multiply
   11,085.21x = 15,312.51 × 10,297.89
4. Step 4: Simplify right side
   11,085.21x = 157,686,543.60
5. Step 5: Solve for x
   x = 157,686,543.60/11,085.21
6. Step 6: Final answer
   x = 14,224.95