Finding the Fourth Proportional to 19,830.32, 29,742.28 and 5,787.05

Step by Step Solution

1. Step 1: Write the proportion equation
   19,830.32 : 29,742.28 = 5,787.05 : x
2. Step 2: Convert to fraction form
   19,830.32/29,742.28 = 5,787.05/x
3. Step 3: Cross multiply
   19,830.32x = 29,742.28 × 5,787.05
4. Step 4: Simplify right side
   19,830.32x = 172,119,883.83
5. Step 5: Solve for x
   x = 172,119,883.83/19,830.32
6. Step 6: Final answer
   x = 8,679.63