Finding the Fourth Proportional to 6,428.34, 8,870.61 and 3,556.93

Step by Step Solution

1. Step 1: Write the proportion equation
   6,428.34 : 8,870.61 = 3,556.93 : x
2. Step 2: Convert to fraction form
   6,428.34/8,870.61 = 3,556.93/x
3. Step 3: Cross multiply
   6,428.34x = 8,870.61 × 3,556.93
4. Step 4: Simplify right side
   6,428.34x = 31,552,138.83
5. Step 5: Solve for x
   x = 31,552,138.83/6,428.34
6. Step 6: Final answer
   x = 4,908.29