Finding the Fourth Proportional to 1,134.80, 1,699.32 and 620.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,134.80 : 1,699.32 = 620.72 : x
2. Step 2: Convert to fraction form
   1,134.80/1,699.32 = 620.72/x
3. Step 3: Cross multiply
   1,134.80x = 1,699.32 × 620.72
4. Step 4: Simplify right side
   1,134.80x = 1,054,801.91
5. Step 5: Solve for x
   x = 1,054,801.91/1,134.80
6. Step 6: Final answer
   x = 929.50