Finding the Fourth Proportional to 28,008.32, 42,024.69 and 9,290.84

Step by Step Solution

1. Step 1: Write the proportion equation
   28,008.32 : 42,024.69 = 9,290.84 : x
2. Step 2: Convert to fraction form
   28,008.32/42,024.69 = 9,290.84/x
3. Step 3: Cross multiply
   28,008.32x = 42,024.69 × 9,290.84
4. Step 4: Simplify right side
   28,008.32x = 390,444,460.72
5. Step 5: Solve for x
   x = 390,444,460.72/28,008.32
6. Step 6: Final answer
   x = 13,940.31