Finding the Fourth Proportional to 7,943.18, 10,939.39 and 7,770.98

Step by Step Solution

1. Step 1: Write the proportion equation
   7,943.18 : 10,939.39 = 7,770.98 : x
2. Step 2: Convert to fraction form
   7,943.18/10,939.39 = 7,770.98/x
3. Step 3: Cross multiply
   7,943.18x = 10,939.39 × 7,770.98
4. Step 4: Simplify right side
   7,943.18x = 85,009,788.82
5. Step 5: Solve for x
   x = 85,009,788.82/7,943.18
6. Step 6: Final answer
   x = 10,702.24