Finding the Fourth Proportional to 42,538.82, 63,806.06 and 12,956

Step by Step Solution

1. Step 1: Write the proportion equation
   42,538.82 : 63,806.06 = 12,956 : x
2. Step 2: Convert to fraction form
   42,538.82/63,806.06 = 12,956/x
3. Step 3: Cross multiply
   42,538.82x = 63,806.06 × 12,956
4. Step 4: Simplify right side
   42,538.82x = 826,671,313.36
5. Step 5: Solve for x
   x = 826,671,313.36/42,538.82
6. Step 6: Final answer
   x = 19,433.34