Finding the Fourth Proportional to 1,875.35, 2,586.13 and 1,213.79

Step by Step Solution

1. Step 1: Write the proportion equation
   1,875.35 : 2,586.13 = 1,213.79 : x
2. Step 2: Convert to fraction form
   1,875.35/2,586.13 = 1,213.79/x
3. Step 3: Cross multiply
   1,875.35x = 2,586.13 × 1,213.79
4. Step 4: Simplify right side
   1,875.35x = 3,139,002.77
5. Step 5: Solve for x
   x = 3,139,002.77/1,875.35
6. Step 6: Final answer
   x = 1,673.82