Finding the Fourth Proportional to 76,126.46, 105,054.71 and 42,137.28

Step by Step Solution

1. Step 1: Write the proportion equation
   76,126.46 : 105,054.71 = 42,137.28 : x
2. Step 2: Convert to fraction form
   76,126.46/105,054.71 = 42,137.28/x
3. Step 3: Cross multiply
   76,126.46x = 105,054.71 × 42,137.28
4. Step 4: Simplify right side
   76,126.46x = 4,426,719,835.93
5. Step 5: Solve for x
   x = 4,426,719,835.93/76,126.46
6. Step 6: Final answer
   x = 58,149.56