Finding the Fourth Proportional to 10,147.79, 15,224.77 and 7,191.95

Step by Step Solution

1. Step 1: Write the proportion equation
   10,147.79 : 15,224.77 = 7,191.95 : x
2. Step 2: Convert to fraction form
   10,147.79/15,224.77 = 7,191.95/x
3. Step 3: Cross multiply
   10,147.79x = 15,224.77 × 7,191.95
4. Step 4: Simplify right side
   10,147.79x = 109,495,784.60
5. Step 5: Solve for x
   x = 109,495,784.60/10,147.79
6. Step 6: Final answer
   x = 10,790.11