Finding the Fourth Proportional to 42,770.30, 64,166.02 and 14,690.78

Step by Step Solution

1. Step 1: Write the proportion equation
   42,770.30 : 64,166.02 = 14,690.78 : x
2. Step 2: Convert to fraction form
   42,770.30/64,166.02 = 14,690.78/x
3. Step 3: Cross multiply
   42,770.30x = 64,166.02 × 14,690.78
4. Step 4: Simplify right side
   42,770.30x = 942,648,883.30
5. Step 5: Solve for x
   x = 942,648,883.30/42,770.30
6. Step 6: Final answer
   x = 22,039.80