Finding the Fourth Proportional to 76,181.75, 105,131.10 and 42,189.49

Step by Step Solution

1. Step 1: Write the proportion equation
   76,181.75 : 105,131.10 = 42,189.49 : x
2. Step 2: Convert to fraction form
   76,181.75/105,131.10 = 42,189.49/x
3. Step 3: Cross multiply
   76,181.75x = 105,131.10 × 42,189.49
4. Step 4: Simplify right side
   76,181.75x = 4,435,427,492.14
5. Step 5: Solve for x
   x = 4,435,427,492.14/76,181.75
6. Step 6: Final answer
   x = 58,221.65