Finding the Fourth Proportional to 76,507.54, 105,578.30 and 42,515.16

Step by Step Solution

1. Step 1: Write the proportion equation
   76,507.54 : 105,578.30 = 42,515.16 : x
2. Step 2: Convert to fraction form
   76,507.54/105,578.30 = 42,515.16/x
3. Step 3: Cross multiply
   76,507.54x = 105,578.30 × 42,515.16
4. Step 4: Simplify right side
   76,507.54x = 4,488,678,317.03
5. Step 5: Solve for x
   x = 4,488,678,317.03/76,507.54
6. Step 6: Final answer
   x = 58,669.75