Finding the Fourth Proportional to 80,933.79, 111,094.42 and 71,781.20

Step by Step Solution

1. Step 1: Write the proportion equation
   80,933.79 : 111,094.42 = 71,781.20 : x
2. Step 2: Convert to fraction form
   80,933.79/111,094.42 = 71,781.20/x
3. Step 3: Cross multiply
   80,933.79x = 111,094.42 × 71,781.20
4. Step 4: Simplify right side
   80,933.79x = 7,974,490,045.98
5. Step 5: Solve for x
   x = 7,974,490,045.98/80,933.79
6. Step 6: Final answer
   x = 98,531.03