Finding the Fourth Proportional to 2,215.89, 3,059.64 and 1,377.81

Step by Step Solution

1. Step 1: Write the proportion equation
   2,215.89 : 3,059.64 = 1,377.81 : x
2. Step 2: Convert to fraction form
   2,215.89/3,059.64 = 1,377.81/x
3. Step 3: Cross multiply
   2,215.89x = 3,059.64 × 1,377.81
4. Step 4: Simplify right side
   2,215.89x = 4,215,602.59
5. Step 5: Solve for x
   x = 4,215,602.59/2,215.89
6. Step 6: Final answer
   x = 1,902.44