Finding the Fourth Proportional to 2,155.06, 2,973.81 and 1,210.60

Step by Step Solution

1. Step 1: Write the proportion equation
   2,155.06 : 2,973.81 = 1,210.60 : x
2. Step 2: Convert to fraction form
   2,155.06/2,973.81 = 1,210.60/x
3. Step 3: Cross multiply
   2,155.06x = 2,973.81 × 1,210.60
4. Step 4: Simplify right side
   2,155.06x = 3,600,094.39
5. Step 5: Solve for x
   x = 3,600,094.39/2,155.06
6. Step 6: Final answer
   x = 1,670.53