Finding the Fourth Proportional to 19,870.47, 29,802.47 and 7,387.56

Step by Step Solution

1. Step 1: Write the proportion equation
   19,870.47 : 29,802.47 = 7,387.56 : x
2. Step 2: Convert to fraction form
   19,870.47/29,802.47 = 7,387.56/x
3. Step 3: Cross multiply
   19,870.47x = 29,802.47 × 7,387.56
4. Step 4: Simplify right side
   19,870.47x = 220,167,498.34
5. Step 5: Solve for x
   x = 220,167,498.34/19,870.47
6. Step 6: Final answer
   x = 11,080.14