Finding the Fourth Proportional to 1,374.96, 1,897.72 and 878.24

Step by Step Solution

1. Step 1: Write the proportion equation
   1,374.96 : 1,897.72 = 878.24 : x
2. Step 2: Convert to fraction form
   1,374.96/1,897.72 = 878.24/x
3. Step 3: Cross multiply
   1,374.96x = 1,897.72 × 878.24
4. Step 4: Simplify right side
   1,374.96x = 1,666,653.61
5. Step 5: Solve for x
   x = 1,666,653.61/1,374.96
6. Step 6: Final answer
   x = 1,212.15