Finding the Fourth Proportional to 118,796.63, 164,073.30 and 78,687.05

Step by Step Solution

1. Step 1: Write the proportion equation
   118,796.63 : 164,073.30 = 78,687.05 : x
2. Step 2: Convert to fraction form
   118,796.63/164,073.30 = 78,687.05/x
3. Step 3: Cross multiply
   118,796.63x = 164,073.30 × 78,687.05
4. Step 4: Simplify right side
   118,796.63x = 12,910,442,845.32
5. Step 5: Solve for x
   x = 12,910,442,845.32/118,796.63
6. Step 6: Final answer
   x = 108,676.85