Finding the Fourth Proportional to 118,637.58, 163,648.71 and 78,351.42

Step by Step Solution

1. Step 1: Write the proportion equation
   118,637.58 : 163,648.71 = 78,351.42 : x
2. Step 2: Convert to fraction form
   118,637.58/163,648.71 = 78,351.42/x
3. Step 3: Cross multiply
   118,637.58x = 163,648.71 × 78,351.42
4. Step 4: Simplify right side
   118,637.58x = 12,822,108,809.67
5. Step 5: Solve for x
   x = 12,822,108,809.67/118,637.58
6. Step 6: Final answer
   x = 108,077.97