Finding the Fourth Proportional to 76,354, 105,368.58 and 42,820

Step by Step Solution

1. Step 1: Write the proportion equation
   76,354 : 105,368.58 = 42,820 : x
2. Step 2: Convert to fraction form
   76,354/105,368.58 = 42,820/x
3. Step 3: Cross multiply
   76,354x = 105,368.58 × 42,820
4. Step 4: Simplify right side
   76,354x = 4,511,882,595.60
5. Step 5: Solve for x
   x = 4,511,882,595.60/76,354
6. Step 6: Final answer
   x = 59,091.63