Finding the Fourth Proportional to 10,085.89, 15,119.61 and 4,242.91

Step by Step Solution

1. Step 1: Write the proportion equation
   10,085.89 : 15,119.61 = 4,242.91 : x
2. Step 2: Convert to fraction form
   10,085.89/15,119.61 = 4,242.91/x
3. Step 3: Cross multiply
   10,085.89x = 15,119.61 × 4,242.91
4. Step 4: Simplify right side
   10,085.89x = 64,151,144.47
5. Step 5: Solve for x
   x = 64,151,144.47/10,085.89
6. Step 6: Final answer
   x = 6,360.48