Finding the Fourth Proportional to 1,092.06, 1,507.05 and 619.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,092.06 : 1,507.05 = 619.98 : x
2. Step 2: Convert to fraction form
   1,092.06/1,507.05 = 619.98/x
3. Step 3: Cross multiply
   1,092.06x = 1,507.05 × 619.98
4. Step 4: Simplify right side
   1,092.06x = 934,340.86
5. Step 5: Solve for x
   x = 934,340.86/1,092.06
6. Step 6: Final answer
   x = 855.58