Finding the Fourth Proportional to 102,871.98, 154,306.89 and 78,064.43

Step by Step Solution

1. Step 1: Write the proportion equation
   102,871.98 : 154,306.89 = 78,064.43 : x
2. Step 2: Convert to fraction form
   102,871.98/154,306.89 = 78,064.43/x
3. Step 3: Cross multiply
   102,871.98x = 154,306.89 × 78,064.43
4. Step 4: Simplify right side
   102,871.98x = 12,045,878,641.39
5. Step 5: Solve for x
   x = 12,045,878,641.39/102,871.98
6. Step 6: Final answer
   x = 117,095.82