Finding the Fourth Proportional to 1,658.12, 2,487.72 and 792.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,658.12 : 2,487.72 = 792.50 : x
2. Step 2: Convert to fraction form
   1,658.12/2,487.72 = 792.50/x
3. Step 3: Cross multiply
   1,658.12x = 2,487.72 × 792.50
4. Step 4: Simplify right side
   1,658.12x = 1,971,518.10
5. Step 5: Solve for x
   x = 1,971,518.10/1,658.12
6. Step 6: Final answer
   x = 1,189.01