Finding the Fourth Proportional to 12,058.78, 18,056.71 and 9,705.94

Step by Step Solution

1. Step 1: Write the proportion equation
   12,058.78 : 18,056.71 = 9,705.94 : x
2. Step 2: Convert to fraction form
   12,058.78/18,056.71 = 9,705.94/x
3. Step 3: Cross multiply
   12,058.78x = 18,056.71 × 9,705.94
4. Step 4: Simplify right side
   12,058.78x = 175,257,343.86
5. Step 5: Solve for x
   x = 175,257,343.86/12,058.78
6. Step 6: Final answer
   x = 14,533.59