Finding the Fourth Proportional to 19,607.31, 29,403.18 and 7,120.52

Step by Step Solution

1. Step 1: Write the proportion equation
   19,607.31 : 29,403.18 = 7,120.52 : x
2. Step 2: Convert to fraction form
   19,607.31/29,403.18 = 7,120.52/x
3. Step 3: Cross multiply
   19,607.31x = 29,403.18 × 7,120.52
4. Step 4: Simplify right side
   19,607.31x = 209,366,004.76
5. Step 5: Solve for x
   x = 209,366,004.76/19,607.31
6. Step 6: Final answer
   x = 10,677.96