Finding the Fourth Proportional to 42,529.32, 63,791.82 and 12,946.50

Step by Step Solution

1. Step 1: Write the proportion equation
   42,529.32 : 63,791.82 = 12,946.50 : x
2. Step 2: Convert to fraction form
   42,529.32/63,791.82 = 12,946.50/x
3. Step 3: Cross multiply
   42,529.32x = 63,791.82 × 12,946.50
4. Step 4: Simplify right side
   42,529.32x = 825,880,797.63
5. Step 5: Solve for x
   x = 825,880,797.63/42,529.32
6. Step 6: Final answer
   x = 19,419.09