Finding the Fourth Proportional to 13,307.20, 19,964.27 and 4,987.34

Step by Step Solution

1. Step 1: Write the proportion equation
   13,307.20 : 19,964.27 = 4,987.34 : x
2. Step 2: Convert to fraction form
   13,307.20/19,964.27 = 4,987.34/x
3. Step 3: Cross multiply
   13,307.20x = 19,964.27 × 4,987.34
4. Step 4: Simplify right side
   13,307.20x = 99,568,602.34
5. Step 5: Solve for x
   x = 99,568,602.34/13,307.20
6. Step 6: Final answer
   x = 7,482.31