Finding the Fourth Proportional to 1,411.23, 2,115.83 and 436.77

Step by Step Solution

1. Step 1: Write the proportion equation
   1,411.23 : 2,115.83 = 436.77 : x
2. Step 2: Convert to fraction form
   1,411.23/2,115.83 = 436.77/x
3. Step 3: Cross multiply
   1,411.23x = 2,115.83 × 436.77
4. Step 4: Simplify right side
   1,411.23x = 924,128.89
5. Step 5: Solve for x
   x = 924,128.89/1,411.23
6. Step 6: Final answer
   x = 654.84