Finding the Fourth Proportional to 102,118.08, 140,912.14 and 56,788.72

Step by Step Solution

1. Step 1: Write the proportion equation
   102,118.08 : 140,912.14 = 56,788.72 : x
2. Step 2: Convert to fraction form
   102,118.08/140,912.14 = 56,788.72/x
3. Step 3: Cross multiply
   102,118.08x = 140,912.14 × 56,788.72
4. Step 4: Simplify right side
   102,118.08x = 8,002,220,063.06
5. Step 5: Solve for x
   x = 8,002,220,063.06/102,118.08
6. Step 6: Final answer
   x = 78,362.42