Finding the Fourth Proportional to 143,380.52, 197,870.10 and 79,721

Step by Step Solution

1. Step 1: Write the proportion equation
   143,380.52 : 197,870.10 = 79,721 : x
2. Step 2: Convert to fraction form
   143,380.52/197,870.10 = 79,721/x
3. Step 3: Cross multiply
   143,380.52x = 197,870.10 × 79,721
4. Step 4: Simplify right side
   143,380.52x = 15,774,402,242.10
5. Step 5: Solve for x
   x = 15,774,402,242.10/143,380.52
6. Step 6: Final answer
   x = 110,017.75