Finding the Fourth Proportional to 1,624.71, 2,242.10 and 878.67

Step by Step Solution

1. Step 1: Write the proportion equation
   1,624.71 : 2,242.10 = 878.67 : x
2. Step 2: Convert to fraction form
   1,624.71/2,242.10 = 878.67/x
3. Step 3: Cross multiply
   1,624.71x = 2,242.10 × 878.67
4. Step 4: Simplify right side
   1,624.71x = 1,970,061.61
5. Step 5: Solve for x
   x = 1,970,061.61/1,624.71
6. Step 6: Final answer
   x = 1,212.56