Finding the Fourth Proportional to 13,076.51, 18,060.27 and 10,128.00

Step by Step Solution

1. Step 1: Write the proportion equation
   13,076.51 : 18,060.27 = 10,128.00 : x
2. Step 2: Convert to fraction form
   13,076.51/18,060.27 = 10,128.00/x
3. Step 3: Cross multiply
   13,076.51x = 18,060.27 × 10,128.00
4. Step 4: Simplify right side
   13,076.51x = 182,914,444.31
5. Step 5: Solve for x
   x = 182,914,444.31/13,076.51
6. Step 6: Final answer
   x = 13,988.02