Finding the Fourth Proportional to 42,525.96, 63,791.56 and 12,946

Step by Step Solution

1. Step 1: Write the proportion equation
   42,525.96 : 63,791.56 = 12,946 : x
2. Step 2: Convert to fraction form
   42,525.96/63,791.56 = 12,946/x
3. Step 3: Cross multiply
   42,525.96x = 63,791.56 × 12,946
4. Step 4: Simplify right side
   42,525.96x = 825,845,535.76
5. Step 5: Solve for x
   x = 825,845,535.76/42,525.96
6. Step 6: Final answer
   x = 19,419.80