Finding the Fourth Proportional to 42,745.58, 64,095.06 and 13,155.56

Step by Step Solution

1. Step 1: Write the proportion equation
   42,745.58 : 64,095.06 = 13,155.56 : x
2. Step 2: Convert to fraction form
   42,745.58/64,095.06 = 13,155.56/x
3. Step 3: Cross multiply
   42,745.58x = 64,095.06 × 13,155.56
4. Step 4: Simplify right side
   42,745.58x = 843,206,407.53
5. Step 5: Solve for x
   x = 843,206,407.53/42,745.58
6. Step 6: Final answer
   x = 19,726.17