Finding the Fourth Proportional to 76,165.11, 105,111.15 and 42,173.60

Step by Step Solution

1. Step 1: Write the proportion equation
   76,165.11 : 105,111.15 = 42,173.60 : x
2. Step 2: Convert to fraction form
   76,165.11/105,111.15 = 42,173.60/x
3. Step 3: Cross multiply
   76,165.11x = 105,111.15 × 42,173.60
4. Step 4: Simplify right side
   76,165.11x = 4,432,915,149.16
5. Step 5: Solve for x
   x = 4,432,915,149.16/76,165.11
6. Step 6: Final answer
   x = 58,201.39