Finding the Fourth Proportional to 4,897.72, 7,345.47 and 1,388.09

Step by Step Solution

1. Step 1: Write the proportion equation
   4,897.72 : 7,345.47 = 1,388.09 : x
2. Step 2: Convert to fraction form
   4,897.72/7,345.47 = 1,388.09/x
3. Step 3: Cross multiply
   4,897.72x = 7,345.47 × 1,388.09
4. Step 4: Simplify right side
   4,897.72x = 10,196,173.45
5. Step 5: Solve for x
   x = 10,196,173.45/4,897.72
6. Step 6: Final answer
   x = 2,081.82