Finding the Fourth Proportional to 42,759.98, 64,146 and 13,180.22

Step by Step Solution

1. Step 1: Write the proportion equation
   42,759.98 : 64,146 = 13,180.22 : x
2. Step 2: Convert to fraction form
   42,759.98/64,146 = 13,180.22/x
3. Step 3: Cross multiply
   42,759.98x = 64,146 × 13,180.22
4. Step 4: Simplify right side
   42,759.98x = 845,458,392.12
5. Step 5: Solve for x
   x = 845,458,392.12/42,759.98
6. Step 6: Final answer
   x = 19,772.19