Finding the Fourth Proportional to 2,111.58, 2,907.60 and 1,913.84

Step by Step Solution

1. Step 1: Write the proportion equation
   2,111.58 : 2,907.60 = 1,913.84 : x
2. Step 2: Convert to fraction form
   2,111.58/2,907.60 = 1,913.84/x
3. Step 3: Cross multiply
   2,111.58x = 2,907.60 × 1,913.84
4. Step 4: Simplify right side
   2,111.58x = 5,564,681.18
5. Step 5: Solve for x
   x = 5,564,681.18/2,111.58
6. Step 6: Final answer
   x = 2,635.32