Finding the Fourth Proportional to 78,938.42, 108,934.89 and 43,128.42

Step by Step Solution

1. Step 1: Write the proportion equation
   78,938.42 : 108,934.89 = 43,128.42 : x
2. Step 2: Convert to fraction form
   78,938.42/108,934.89 = 43,128.42/x
3. Step 3: Cross multiply
   78,938.42x = 108,934.89 × 43,128.42
4. Step 4: Simplify right side
   78,938.42x = 4,698,189,688.57
5. Step 5: Solve for x
   x = 4,698,189,688.57/78,938.42
6. Step 6: Final answer
   x = 59,517.15