Finding the Fourth Proportional to 78,987.98, 109,003.38 and 43,178.13

Step by Step Solution

1. Step 1: Write the proportion equation
   78,987.98 : 109,003.38 = 43,178.13 : x
2. Step 2: Convert to fraction form
   78,987.98/109,003.38 = 43,178.13/x
3. Step 3: Cross multiply
   78,987.98x = 109,003.38 × 43,178.13
4. Step 4: Simplify right side
   78,987.98x = 4,706,562,112.08
5. Step 5: Solve for x
   x = 4,706,562,112.08/78,987.98
6. Step 6: Final answer
   x = 59,585.81