Finding the Fourth Proportional to 10,881.63, 15,002.37 and 7,854.21

Step by Step Solution

1. Step 1: Write the proportion equation
   10,881.63 : 15,002.37 = 7,854.21 : x
2. Step 2: Convert to fraction form
   10,881.63/15,002.37 = 7,854.21/x
3. Step 3: Cross multiply
   10,881.63x = 15,002.37 × 7,854.21
4. Step 4: Simplify right side
   10,881.63x = 117,831,764.48
5. Step 5: Solve for x
   x = 117,831,764.48/10,881.63
6. Step 6: Final answer
   x = 10,828.50