Finding the Fourth Proportional to 1,376.47, 1,900.16 and 879.67

Step by Step Solution

1. Step 1: Write the proportion equation
   1,376.47 : 1,900.16 = 879.67 : x
2. Step 2: Convert to fraction form
   1,376.47/1,900.16 = 879.67/x
3. Step 3: Cross multiply
   1,376.47x = 1,900.16 × 879.67
4. Step 4: Simplify right side
   1,376.47x = 1,671,513.75
5. Step 5: Solve for x
   x = 1,671,513.75/1,376.47
6. Step 6: Final answer
   x = 1,214.35