Finding the Fourth Proportional to 1,003.12, 1,501.80 and 926.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,003.12 : 1,501.80 = 926.56 : x
2. Step 2: Convert to fraction form
   1,003.12/1,501.80 = 926.56/x
3. Step 3: Cross multiply
   1,003.12x = 1,501.80 × 926.56
4. Step 4: Simplify right side
   1,003.12x = 1,391,507.81
5. Step 5: Solve for x
   x = 1,391,507.81/1,003.12
6. Step 6: Final answer
   x = 1,387.18