Finding the Fourth Proportional to 42,970.36, 64,443.03 and 14,889.28

Step by Step Solution

1. Step 1: Write the proportion equation
   42,970.36 : 64,443.03 = 14,889.28 : x
2. Step 2: Convert to fraction form
   42,970.36/64,443.03 = 14,889.28/x
3. Step 3: Cross multiply
   42,970.36x = 64,443.03 × 14,889.28
4. Step 4: Simplify right side
   42,970.36x = 959,510,317.72
5. Step 5: Solve for x
   x = 959,510,317.72/42,970.36
6. Step 6: Final answer
   x = 22,329.59