Finding the Fourth Proportional to 78,939.45, 108,938.01 and 43,131.68

Step by Step Solution

1. Step 1: Write the proportion equation
   78,939.45 : 108,938.01 = 43,131.68 : x
2. Step 2: Convert to fraction form
   78,939.45/108,938.01 = 43,131.68/x
3. Step 3: Cross multiply
   78,939.45x = 108,938.01 × 43,131.68
4. Step 4: Simplify right side
   78,939.45x = 4,698,679,659.50
5. Step 5: Solve for x
   x = 4,698,679,659.50/78,939.45
6. Step 6: Final answer
   x = 59,522.58