Finding the Fourth Proportional to 76,196.78, 105,136.62 and 47,886.12

Step by Step Solution

1. Step 1: Write the proportion equation
   76,196.78 : 105,136.62 = 47,886.12 : x
2. Step 2: Convert to fraction form
   76,196.78/105,136.62 = 47,886.12/x
3. Step 3: Cross multiply
   76,196.78x = 105,136.62 × 47,886.12
4. Step 4: Simplify right side
   76,196.78x = 5,034,584,801.71
5. Step 5: Solve for x
   x = 5,034,584,801.71/76,196.78
6. Step 6: Final answer
   x = 66,073.46