Finding the Fourth Proportional to 80,269.16, 120,368.84 and 42,820.88

Step by Step Solution

1. Step 1: Write the proportion equation
   80,269.16 : 120,368.84 = 42,820.88 : x
2. Step 2: Convert to fraction form
   80,269.16/120,368.84 = 42,820.88/x
3. Step 3: Cross multiply
   80,269.16x = 120,368.84 × 42,820.88
4. Step 4: Simplify right side
   80,269.16x = 5,154,298,837.43
5. Step 5: Solve for x
   x = 5,154,298,837.43/80,269.16
6. Step 6: Final answer
   x = 64,212.70