Finding the Fourth Proportional to 9,920.30, 14,856.15 and 4,720.10

Step by Step Solution

1. Step 1: Write the proportion equation
   9,920.30 : 14,856.15 = 4,720.10 : x
2. Step 2: Convert to fraction form
   9,920.30/14,856.15 = 4,720.10/x
3. Step 3: Cross multiply
   9,920.30x = 14,856.15 × 4,720.10
4. Step 4: Simplify right side
   9,920.30x = 70,122,513.62
5. Step 5: Solve for x
   x = 70,122,513.62/9,920.30
6. Step 6: Final answer
   x = 7,068.59