Finding the Fourth Proportional to 10,001.42, 14,991.38 and 5,316.72

Step by Step Solution

1. Step 1: Write the proportion equation
   10,001.42 : 14,991.38 = 5,316.72 : x
2. Step 2: Convert to fraction form
   10,001.42/14,991.38 = 5,316.72/x
3. Step 3: Cross multiply
   10,001.42x = 14,991.38 × 5,316.72
4. Step 4: Simplify right side
   10,001.42x = 79,704,991.34
5. Step 5: Solve for x
   x = 79,704,991.34/10,001.42
6. Step 6: Final answer
   x = 7,969.36