Finding the Fourth Proportional to 7,848.21, 10,817.52 and 7,640.46

Step by Step Solution

1. Step 1: Write the proportion equation
   7,848.21 : 10,817.52 = 7,640.46 : x
2. Step 2: Convert to fraction form
   7,848.21/10,817.52 = 7,640.46/x
3. Step 3: Cross multiply
   7,848.21x = 10,817.52 × 7,640.46
4. Step 4: Simplify right side
   7,848.21x = 82,650,828.86
5. Step 5: Solve for x
   x = 82,650,828.86/7,848.21
6. Step 6: Final answer
   x = 10,531.17