Finding the Fourth Proportional to 1,420.32, 2,131.74 and 1,009.92

Step by Step Solution

1. Step 1: Write the proportion equation
   1,420.32 : 2,131.74 = 1,009.92 : x
2. Step 2: Convert to fraction form
   1,420.32/2,131.74 = 1,009.92/x
3. Step 3: Cross multiply
   1,420.32x = 2,131.74 × 1,009.92
4. Step 4: Simplify right side
   1,420.32x = 2,152,886.86
5. Step 5: Solve for x
   x = 2,152,886.86/1,420.32
6. Step 6: Final answer
   x = 1,515.78