Finding the Fourth Proportional to 76,146, 105,066.90 and 49,284.78

Step by Step Solution

1. Step 1: Write the proportion equation
   76,146 : 105,066.90 = 49,284.78 : x
2. Step 2: Convert to fraction form
   76,146/105,066.90 = 49,284.78/x
3. Step 3: Cross multiply
   76,146x = 105,066.90 × 49,284.78
4. Step 4: Simplify right side
   76,146x = 5,178,199,051.78
5. Step 5: Solve for x
   x = 5,178,199,051.78/76,146
6. Step 6: Final answer
   x = 68,003.56