Finding the Fourth Proportional to 76,397.05, 105,425.15 and 42,407.05

Step by Step Solution

1. Step 1: Write the proportion equation
   76,397.05 : 105,425.15 = 42,407.05 : x
2. Step 2: Convert to fraction form
   76,397.05/105,425.15 = 42,407.05/x
3. Step 3: Cross multiply
   76,397.05x = 105,425.15 × 42,407.05
4. Step 4: Simplify right side
   76,397.05x = 4,470,769,395.27
5. Step 5: Solve for x
   x = 4,470,769,395.27/76,397.05
6. Step 6: Final answer
   x = 58,520.18