Finding the Fourth Proportional to 1,926.72, 2,658.86 and 1,042.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,926.72 : 2,658.86 = 1,042.50 : x
2. Step 2: Convert to fraction form
   1,926.72/2,658.86 = 1,042.50/x
3. Step 3: Cross multiply
   1,926.72x = 2,658.86 × 1,042.50
4. Step 4: Simplify right side
   1,926.72x = 2,771,861.55
5. Step 5: Solve for x
   x = 2,771,861.55/1,926.72
6. Step 6: Final answer
   x = 1,438.64