Finding the Fourth Proportional to 10,300.52, 15,438.88 and 4,742.21

Step by Step Solution

1. Step 1: Write the proportion equation
   10,300.52 : 15,438.88 = 4,742.21 : x
2. Step 2: Convert to fraction form
   10,300.52/15,438.88 = 4,742.21/x
3. Step 3: Cross multiply
   10,300.52x = 15,438.88 × 4,742.21
4. Step 4: Simplify right side
   10,300.52x = 73,214,411.12
5. Step 5: Solve for x
   x = 73,214,411.12/10,300.52
6. Step 6: Final answer
   x = 7,107.84