Finding the Fourth Proportional to 77,440, 106,868.16 and 42,112

Step by Step Solution

1. Step 1: Write the proportion equation
   77,440 : 106,868.16 = 42,112 : x
2. Step 2: Convert to fraction form
   77,440/106,868.16 = 42,112/x
3. Step 3: Cross multiply
   77,440x = 106,868.16 × 42,112
4. Step 4: Simplify right side
   77,440x = 4,500,431,953.92
5. Step 5: Solve for x
   x = 4,500,431,953.92/77,440
6. Step 6: Final answer
   x = 58,115.08