Finding the Fourth Proportional to 2,379.71, 3,285.54 and 2,130.60

Step by Step Solution

1. Step 1: Write the proportion equation
   2,379.71 : 3,285.54 = 2,130.60 : x
2. Step 2: Convert to fraction form
   2,379.71/3,285.54 = 2,130.60/x
3. Step 3: Cross multiply
   2,379.71x = 3,285.54 × 2,130.60
4. Step 4: Simplify right side
   2,379.71x = 7,000,171.52
5. Step 5: Solve for x
   x = 7,000,171.52/2,379.71
6. Step 6: Final answer
   x = 2,941.61