Finding the Fourth Proportional to 13,930.16, 19,224.12 and 7,642.72

Step by Step Solution

1. Step 1: Write the proportion equation
   13,930.16 : 19,224.12 = 7,642.72 : x
2. Step 2: Convert to fraction form
   13,930.16/19,224.12 = 7,642.72/x
3. Step 3: Cross multiply
   13,930.16x = 19,224.12 × 7,642.72
4. Step 4: Simplify right side
   13,930.16x = 146,924,566.41
5. Step 5: Solve for x
   x = 146,924,566.41/13,930.16
6. Step 6: Final answer
   x = 10,547.23