Finding the Fourth Proportional to 1,005.62, 1,388.06 and 651.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,005.62 : 1,388.06 = 651.56 : x
2. Step 2: Convert to fraction form
   1,005.62/1,388.06 = 651.56/x
3. Step 3: Cross multiply
   1,005.62x = 1,388.06 × 651.56
4. Step 4: Simplify right side
   1,005.62x = 904,409.19
5. Step 5: Solve for x
   x = 904,409.19/1,005.62
6. Step 6: Final answer
   x = 899.35