Finding the Fourth Proportional to 1,670.76, 2,501.89 and 1,396.17

Step by Step Solution

1. Step 1: Write the proportion equation
   1,670.76 : 2,501.89 = 1,396.17 : x
2. Step 2: Convert to fraction form
   1,670.76/2,501.89 = 1,396.17/x
3. Step 3: Cross multiply
   1,670.76x = 2,501.89 × 1,396.17
4. Step 4: Simplify right side
   1,670.76x = 3,493,060.27
5. Step 5: Solve for x
   x = 3,493,060.27/1,670.76
6. Step 6: Final answer
   x = 2,090.70