Finding the Fourth Proportional to 1,077.86, 1,487.46 and 612.14

Step by Step Solution

1. Step 1: Write the proportion equation
   1,077.86 : 1,487.46 = 612.14 : x
2. Step 2: Convert to fraction form
   1,077.86/1,487.46 = 612.14/x
3. Step 3: Cross multiply
   1,077.86x = 1,487.46 × 612.14
4. Step 4: Simplify right side
   1,077.86x = 910,533.76
5. Step 5: Solve for x
   x = 910,533.76/1,077.86
6. Step 6: Final answer
   x = 844.76