Finding the Fourth Proportional to 12,108.78, 16,707.15 and 7,070.13

Step by Step Solution

1. Step 1: Write the proportion equation
   12,108.78 : 16,707.15 = 7,070.13 : x
2. Step 2: Convert to fraction form
   12,108.78/16,707.15 = 7,070.13/x
3. Step 3: Cross multiply
   12,108.78x = 16,707.15 × 7,070.13
4. Step 4: Simplify right side
   12,108.78x = 118,121,722.43
5. Step 5: Solve for x
   x = 118,121,722.43/12,108.78
6. Step 6: Final answer
   x = 9,755.05