Finding the Fourth Proportional to 76,142.90, 105,075.67 and 42,151.38

Step by Step Solution

1. Step 1: Write the proportion equation
   76,142.90 : 105,075.67 = 42,151.38 : x
2. Step 2: Convert to fraction form
   76,142.90/105,075.67 = 42,151.38/x
3. Step 3: Cross multiply
   76,142.90x = 105,075.67 × 42,151.38
4. Step 4: Simplify right side
   76,142.90x = 4,429,084,494.92
5. Step 5: Solve for x
   x = 4,429,084,494.92/76,142.90
6. Step 6: Final answer
   x = 58,168.06