Finding the Fourth Proportional to 42,958.88, 64,411.68 and 13,368.32

Step by Step Solution

1. Step 1: Write the proportion equation
   42,958.88 : 64,411.68 = 13,368.32 : x
2. Step 2: Convert to fraction form
   42,958.88/64,411.68 = 13,368.32/x
3. Step 3: Cross multiply
   42,958.88x = 64,411.68 × 13,368.32
4. Step 4: Simplify right side
   42,958.88x = 861,075,949.98
5. Step 5: Solve for x
   x = 861,075,949.98/42,958.88
6. Step 6: Final answer
   x = 20,044.19