Finding the Fourth Proportional to 78,987.87, 109,003.46 and 43,178.31

Step by Step Solution

1. Step 1: Write the proportion equation
   78,987.87 : 109,003.46 = 43,178.31 : x
2. Step 2: Convert to fraction form
   78,987.87/109,003.46 = 43,178.31/x
3. Step 3: Cross multiply
   78,987.87x = 109,003.46 × 43,178.31
4. Step 4: Simplify right side
   78,987.87x = 4,706,584,971.06
5. Step 5: Solve for x
   x = 4,706,584,971.06/78,987.87
6. Step 6: Final answer
   x = 59,586.17