Finding the Fourth Proportional to 76,136, 105,067.68 and 42,608.48

Step by Step Solution

1. Step 1: Write the proportion equation
   76,136 : 105,067.68 = 42,608.48 : x
2. Step 2: Convert to fraction form
   76,136/105,067.68 = 42,608.48/x
3. Step 3: Cross multiply
   76,136x = 105,067.68 × 42,608.48
4. Step 4: Simplify right side
   76,136x = 4,476,774,141.93
5. Step 5: Solve for x
   x = 4,476,774,141.93/76,136
6. Step 6: Final answer
   x = 58,799.70