Finding the Fourth Proportional to 7,557.71, 10,428.72 and 4,200.09

Step by Step Solution

1. Step 1: Write the proportion equation
   7,557.71 : 10,428.72 = 4,200.09 : x
2. Step 2: Convert to fraction form
   7,557.71/10,428.72 = 4,200.09/x
3. Step 3: Cross multiply
   7,557.71x = 10,428.72 × 4,200.09
4. Step 4: Simplify right side
   7,557.71x = 43,801,562.58
5. Step 5: Solve for x
   x = 43,801,562.58/7,557.71
6. Step 6: Final answer
   x = 5,795.62