Finding the Fourth Proportional to 105,077.40, 157,479.30 and 42,675

Step by Step Solution

1. Step 1: Write the proportion equation
   105,077.40 : 157,479.30 = 42,675 : x
2. Step 2: Convert to fraction form
   105,077.40/157,479.30 = 42,675/x
3. Step 3: Cross multiply
   105,077.40x = 157,479.30 × 42,675
4. Step 4: Simplify right side
   105,077.40x = 6,720,429,127.50
5. Step 5: Solve for x
   x = 6,720,429,127.50/105,077.40
6. Step 6: Final answer
   x = 63,956.94