Finding the Fourth Proportional to 1,865.01, 2,573.20 and 1,201.62

Step by Step Solution

1. Step 1: Write the proportion equation
   1,865.01 : 2,573.20 = 1,201.62 : x
2. Step 2: Convert to fraction form
   1,865.01/2,573.20 = 1,201.62/x
3. Step 3: Cross multiply
   1,865.01x = 2,573.20 × 1,201.62
4. Step 4: Simplify right side
   1,865.01x = 3,091,995.72
5. Step 5: Solve for x
   x = 3,091,995.72/1,865.01
6. Step 6: Final answer
   x = 1,657.90