Finding the Fourth Proportional to 42,701.12, 64,041.89 and 12,709.25

Step by Step Solution

1. Step 1: Write the proportion equation
   42,701.12 : 64,041.89 = 12,709.25 : x
2. Step 2: Convert to fraction form
   42,701.12/64,041.89 = 12,709.25/x
3. Step 3: Cross multiply
   42,701.12x = 64,041.89 × 12,709.25
4. Step 4: Simplify right side
   42,701.12x = 813,924,006.73
5. Step 5: Solve for x
   x = 813,924,006.73/42,701.12
6. Step 6: Final answer
   x = 19,060.95