Finding the Fourth Proportional to 1,870.59, 2,580.88 and 1,207.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,870.59 : 2,580.88 = 1,207.82 : x
2. Step 2: Convert to fraction form
   1,870.59/2,580.88 = 1,207.82/x
3. Step 3: Cross multiply
   1,870.59x = 2,580.88 × 1,207.82
4. Step 4: Simplify right side
   1,870.59x = 3,117,238.48
5. Step 5: Solve for x
   x = 3,117,238.48/1,870.59
6. Step 6: Final answer
   x = 1,666.45