Finding the Fourth Proportional to 1,679.84, 2,510.50 and 1,242.02

Step by Step Solution

1. Step 1: Write the proportion equation
   1,679.84 : 2,510.50 = 1,242.02 : x
2. Step 2: Convert to fraction form
   1,679.84/2,510.50 = 1,242.02/x
3. Step 3: Cross multiply
   1,679.84x = 2,510.50 × 1,242.02
4. Step 4: Simplify right side
   1,679.84x = 3,118,091.21
5. Step 5: Solve for x
   x = 3,118,091.21/1,679.84
6. Step 6: Final answer
   x = 1,856.18