Finding the Fourth Proportional to 10,970.10, 15,155.96 and 7,191.86

Step by Step Solution

1. Step 1: Write the proportion equation
   10,970.10 : 15,155.96 = 7,191.86 : x
2. Step 2: Convert to fraction form
   10,970.10/15,155.96 = 7,191.86/x
3. Step 3: Cross multiply
   10,970.10x = 15,155.96 × 7,191.86
4. Step 4: Simplify right side
   10,970.10x = 108,999,430.75
5. Step 5: Solve for x
   x = 108,999,430.75/10,970.10
6. Step 6: Final answer
   x = 9,936.05