Finding the Fourth Proportional to 76,147.31, 105,083.30 and 42,613.31

Step by Step Solution

1. Step 1: Write the proportion equation
   76,147.31 : 105,083.30 = 42,613.31 : x
2. Step 2: Convert to fraction form
   76,147.31/105,083.30 = 42,613.31/x
3. Step 3: Cross multiply
   76,147.31x = 105,083.30 × 42,613.31
4. Step 4: Simplify right side
   76,147.31x = 4,477,947,607.96
5. Step 5: Solve for x
   x = 4,477,947,607.96/76,147.31
6. Step 6: Final answer
   x = 58,806.38