Finding the Fourth Proportional to 13,093.31, 18,064.17 and 7,787.40

Step by Step Solution

1. Step 1: Write the proportion equation
   13,093.31 : 18,064.17 = 7,787.40 : x
2. Step 2: Convert to fraction form
   13,093.31/18,064.17 = 7,787.40/x
3. Step 3: Cross multiply
   13,093.31x = 18,064.17 × 7,787.40
4. Step 4: Simplify right side
   13,093.31x = 140,672,917.46
5. Step 5: Solve for x
   x = 140,672,917.46/13,093.31
6. Step 6: Final answer
   x = 10,743.88