Finding the Fourth Proportional to 112,144.91, 168,030.05 and 78,805.31

Step by Step Solution

1. Step 1: Write the proportion equation
   112,144.91 : 168,030.05 = 78,805.31 : x
2. Step 2: Convert to fraction form
   112,144.91/168,030.05 = 78,805.31/x
3. Step 3: Cross multiply
   112,144.91x = 168,030.05 × 78,805.31
4. Step 4: Simplify right side
   112,144.91x = 13,241,658,945.39
5. Step 5: Solve for x
   x = 13,241,658,945.39/112,144.91
6. Step 6: Final answer
   x = 118,076.33