Finding the Fourth Proportional to 1,915.02, 2,859.59 and 1,679.01

Step by Step Solution

1. Step 1: Write the proportion equation
   1,915.02 : 2,859.59 = 1,679.01 : x
2. Step 2: Convert to fraction form
   1,915.02/2,859.59 = 1,679.01/x
3. Step 3: Cross multiply
   1,915.02x = 2,859.59 × 1,679.01
4. Step 4: Simplify right side
   1,915.02x = 4,801,271.81
5. Step 5: Solve for x
   x = 4,801,271.81/1,915.02
6. Step 6: Final answer
   x = 2,507.17