Finding the Fourth Proportional to 1,200.79, 1,800.82 and 507.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,200.79 : 1,800.82 = 507.32 : x
2. Step 2: Convert to fraction form
   1,200.79/1,800.82 = 507.32/x
3. Step 3: Cross multiply
   1,200.79x = 1,800.82 × 507.32
4. Step 4: Simplify right side
   1,200.79x = 913,592.00
5. Step 5: Solve for x
   x = 913,592.00/1,200.79
6. Step 6: Final answer
   x = 760.83