Finding the Fourth Proportional to 1,092.07, 1,507.27 and 619.99

Step by Step Solution

1. Step 1: Write the proportion equation
   1,092.07 : 1,507.27 = 619.99 : x
2. Step 2: Convert to fraction form
   1,092.07/1,507.27 = 619.99/x
3. Step 3: Cross multiply
   1,092.07x = 1,507.27 × 619.99
4. Step 4: Simplify right side
   1,092.07x = 934,492.33
5. Step 5: Solve for x
   x = 934,492.33/1,092.07
6. Step 6: Final answer
   x = 855.71