Finding the Fourth Proportional to 9,987.05, 14,978.51 and 4,719.82

Step by Step Solution

1. Step 1: Write the proportion equation
   9,987.05 : 14,978.51 = 4,719.82 : x
2. Step 2: Convert to fraction form
   9,987.05/14,978.51 = 4,719.82/x
3. Step 3: Cross multiply
   9,987.05x = 14,978.51 × 4,719.82
4. Step 4: Simplify right side
   9,987.05x = 70,695,871.07
5. Step 5: Solve for x
   x = 70,695,871.07/9,987.05
6. Step 6: Final answer
   x = 7,078.75