Finding the Fourth Proportional to 1,620.34, 2,429.89 and 888.91

Step by Step Solution

1. Step 1: Write the proportion equation
   1,620.34 : 2,429.89 = 888.91 : x
2. Step 2: Convert to fraction form
   1,620.34/2,429.89 = 888.91/x
3. Step 3: Cross multiply
   1,620.34x = 2,429.89 × 888.91
4. Step 4: Simplify right side
   1,620.34x = 2,159,953.52
5. Step 5: Solve for x
   x = 2,159,953.52/1,620.34
6. Step 6: Final answer
   x = 1,333.02