Finding the Fourth Proportional to 1,670.94, 2,507 and 1,117.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,670.94 : 2,507 = 1,117.86 : x
2. Step 2: Convert to fraction form
   1,670.94/2,507 = 1,117.86/x
3. Step 3: Cross multiply
   1,670.94x = 2,507 × 1,117.86
4. Step 4: Simplify right side
   1,670.94x = 2,802,475.02
5. Step 5: Solve for x
   x = 2,802,475.02/1,670.94
6. Step 6: Final answer
   x = 1,677.18