Finding the Fourth Proportional to 42,632.76, 63,946.44 and 13,047.78

Step by Step Solution

1. Step 1: Write the proportion equation
   42,632.76 : 63,946.44 = 13,047.78 : x
2. Step 2: Convert to fraction form
   42,632.76/63,946.44 = 13,047.78/x
3. Step 3: Cross multiply
   42,632.76x = 63,946.44 × 13,047.78
4. Step 4: Simplify right side
   42,632.76x = 834,359,080.90
5. Step 5: Solve for x
   x = 834,359,080.90/42,632.76
6. Step 6: Final answer
   x = 19,570.84