Finding the Fourth Proportional to 1,488.78, 2,054.13 and 929.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,488.78 : 2,054.13 = 929.52 : x
2. Step 2: Convert to fraction form
   1,488.78/2,054.13 = 929.52/x
3. Step 3: Cross multiply
   1,488.78x = 2,054.13 × 929.52
4. Step 4: Simplify right side
   1,488.78x = 1,909,354.92
5. Step 5: Solve for x
   x = 1,909,354.92/1,488.78
6. Step 6: Final answer
   x = 1,282.50