Finding the Fourth Proportional to 9,621.32, 13,277.48 and 5,642.51

Step by Step Solution

1. Step 1: Write the proportion equation
   9,621.32 : 13,277.48 = 5,642.51 : x
2. Step 2: Convert to fraction form
   9,621.32/13,277.48 = 5,642.51/x
3. Step 3: Cross multiply
   9,621.32x = 13,277.48 × 5,642.51
4. Step 4: Simplify right side
   9,621.32x = 74,918,219.07
5. Step 5: Solve for x
   x = 74,918,219.07/9,621.32
6. Step 6: Final answer
   x = 7,786.69