Finding the Fourth Proportional to 10,907.46, 16,389.27 and 10,602.63

Step by Step Solution

1. Step 1: Write the proportion equation
   10,907.46 : 16,389.27 = 10,602.63 : x
2. Step 2: Convert to fraction form
   10,907.46/16,389.27 = 10,602.63/x
3. Step 3: Cross multiply
   10,907.46x = 16,389.27 × 10,602.63
4. Step 4: Simplify right side
   10,907.46x = 173,769,365.78
5. Step 5: Solve for x
   x = 173,769,365.78/10,907.46
6. Step 6: Final answer
   x = 15,931.24