Finding the Fourth Proportional to 76,453, 105,505.20 and 42,929.80

Step by Step Solution

1. Step 1: Write the proportion equation
   76,453 : 105,505.20 = 42,929.80 : x
2. Step 2: Convert to fraction form
   76,453/105,505.20 = 42,929.80/x
3. Step 3: Cross multiply
   76,453x = 105,505.20 × 42,929.80
4. Step 4: Simplify right side
   76,453x = 4,529,317,134.96
5. Step 5: Solve for x
   x = 4,529,317,134.96/76,453
6. Step 6: Final answer
   x = 59,243.16