Finding the Fourth Proportional to 9,642.84, 13,307.40 and 5,451

Step by Step Solution

1. Step 1: Write the proportion equation
   9,642.84 : 13,307.40 = 5,451 : x
2. Step 2: Convert to fraction form
   9,642.84/13,307.40 = 5,451/x
3. Step 3: Cross multiply
   9,642.84x = 13,307.40 × 5,451
4. Step 4: Simplify right side
   9,642.84x = 72,538,637.40
5. Step 5: Solve for x
   x = 72,538,637.40/9,642.84
6. Step 6: Final answer
   x = 7,522.54