Finding the Fourth Proportional to 42,765.98, 64,156.59 and 14,678.75

Step by Step Solution

1. Step 1: Write the proportion equation
   42,765.98 : 64,156.59 = 14,678.75 : x
2. Step 2: Convert to fraction form
   42,765.98/64,156.59 = 14,678.75/x
3. Step 3: Cross multiply
   42,765.98x = 64,156.59 × 14,678.75
4. Step 4: Simplify right side
   42,765.98x = 941,738,705.85
5. Step 5: Solve for x
   x = 941,738,705.85/42,765.98
6. Step 6: Final answer
   x = 22,020.75