Finding the Fourth Proportional to 10,407.02, 15,621.53 and 10,171.98

Step by Step Solution

1. Step 1: Write the proportion equation
   10,407.02 : 15,621.53 = 10,171.98 : x
2. Step 2: Convert to fraction form
   10,407.02/15,621.53 = 10,171.98/x
3. Step 3: Cross multiply
   10,407.02x = 15,621.53 × 10,171.98
4. Step 4: Simplify right side
   10,407.02x = 158,901,839.87
5. Step 5: Solve for x
   x = 158,901,839.87/10,407.02
6. Step 6: Final answer
   x = 15,268.72