Finding the Fourth Proportional to 78,390, 108,178.20 and 43,062

Step by Step Solution

1. Step 1: Write the proportion equation
   78,390 : 108,178.20 = 43,062 : x
2. Step 2: Convert to fraction form
   78,390/108,178.20 = 43,062/x
3. Step 3: Cross multiply
   78,390x = 108,178.20 × 43,062
4. Step 4: Simplify right side
   78,390x = 4,658,369,648.40
5. Step 5: Solve for x
   x = 4,658,369,648.40/78,390
6. Step 6: Final answer
   x = 59,425.56