Finding the Fourth Proportional to 1,642.93, 2,267.31 and 934.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,642.93 : 2,267.31 = 934.72 : x
2. Step 2: Convert to fraction form
   1,642.93/2,267.31 = 934.72/x
3. Step 3: Cross multiply
   1,642.93x = 2,267.31 × 934.72
4. Step 4: Simplify right side
   1,642.93x = 2,119,300.00
5. Step 5: Solve for x
   x = 2,119,300.00/1,642.93
6. Step 6: Final answer
   x = 1,289.95