Finding the Fourth Proportional to 80,434.73, 120,672.59 and 56,788.34

Step by Step Solution

1. Step 1: Write the proportion equation
   80,434.73 : 120,672.59 = 56,788.34 : x
2. Step 2: Convert to fraction form
   80,434.73/120,672.59 = 56,788.34/x
3. Step 3: Cross multiply
   80,434.73x = 120,672.59 × 56,788.34
4. Step 4: Simplify right side
   80,434.73x = 6,852,796,513.25
5. Step 5: Solve for x
   x = 6,852,796,513.25/80,434.73
6. Step 6: Final answer
   x = 85,196.99