Finding the Fourth Proportional to 19,598.85, 29,420.42 and 7,920.27

Step by Step Solution

1. Step 1: Write the proportion equation
   19,598.85 : 29,420.42 = 7,920.27 : x
2. Step 2: Convert to fraction form
   19,598.85/29,420.42 = 7,920.27/x
3. Step 3: Cross multiply
   19,598.85x = 29,420.42 × 7,920.27
4. Step 4: Simplify right side
   19,598.85x = 233,017,630.31
5. Step 5: Solve for x
   x = 233,017,630.31/19,598.85
6. Step 6: Final answer
   x = 11,889.35