Finding the Fourth Proportional to 12,877.83, 17,775.68 and 7,845.30

Step by Step Solution

1. Step 1: Write the proportion equation
   12,877.83 : 17,775.68 = 7,845.30 : x
2. Step 2: Convert to fraction form
   12,877.83/17,775.68 = 7,845.30/x
3. Step 3: Cross multiply
   12,877.83x = 17,775.68 × 7,845.30
4. Step 4: Simplify right side
   12,877.83x = 139,455,542.30
5. Step 5: Solve for x
   x = 139,455,542.30/12,877.83
6. Step 6: Final answer
   x = 10,829.12