Finding the Fourth Proportional to 1,525.32, 2,105.16 and 1,213.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,525.32 : 2,105.16 = 1,213.05 : x
2. Step 2: Convert to fraction form
   1,525.32/2,105.16 = 1,213.05/x
3. Step 3: Cross multiply
   1,525.32x = 2,105.16 × 1,213.05
4. Step 4: Simplify right side
   1,525.32x = 2,553,664.34
5. Step 5: Solve for x
   x = 2,553,664.34/1,525.32
6. Step 6: Final answer
   x = 1,674.18