Finding the Fourth Proportional to 10,100.61, 15,151.91 and 3,865.86

Step by Step Solution

1. Step 1: Write the proportion equation
   10,100.61 : 15,151.91 = 3,865.86 : x
2. Step 2: Convert to fraction form
   10,100.61/15,151.91 = 3,865.86/x
3. Step 3: Cross multiply
   10,100.61x = 15,151.91 × 3,865.86
4. Step 4: Simplify right side
   10,100.61x = 58,575,162.79
5. Step 5: Solve for x
   x = 58,575,162.79/10,100.61
6. Step 6: Final answer
   x = 5,799.17