Finding the Fourth Proportional to 11,663.84, 16,106.16 and 10,001.72

Step by Step Solution

1. Step 1: Write the proportion equation
   11,663.84 : 16,106.16 = 10,001.72 : x
2. Step 2: Convert to fraction form
   11,663.84/16,106.16 = 10,001.72/x
3. Step 3: Cross multiply
   11,663.84x = 16,106.16 × 10,001.72
4. Step 4: Simplify right side
   11,663.84x = 161,089,222.06
5. Step 5: Solve for x
   x = 161,089,222.06/11,663.84
6. Step 6: Final answer
   x = 13,811.00