Finding the Fourth Proportional to 1,177.86, 1,621.98 and 1,152.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,177.86 : 1,621.98 = 1,152.30 : x
2. Step 2: Convert to fraction form
   1,177.86/1,621.98 = 1,152.30/x
3. Step 3: Cross multiply
   1,177.86x = 1,621.98 × 1,152.30
4. Step 4: Simplify right side
   1,177.86x = 1,869,007.55
5. Step 5: Solve for x
   x = 1,869,007.55/1,177.86
6. Step 6: Final answer
   x = 1,586.78