Finding the Fourth Proportional to 1,914.78, 2,639.60 and 1,521.94

Step by Step Solution

1. Step 1: Write the proportion equation
   1,914.78 : 2,639.60 = 1,521.94 : x
2. Step 2: Convert to fraction form
   1,914.78/2,639.60 = 1,521.94/x
3. Step 3: Cross multiply
   1,914.78x = 2,639.60 × 1,521.94
4. Step 4: Simplify right side
   1,914.78x = 4,017,312.82
5. Step 5: Solve for x
   x = 4,017,312.82/1,914.78
6. Step 6: Final answer
   x = 2,098.05