Finding the Fourth Proportional to 76,308.36, 105,303.56 and 42,316.30

Step by Step Solution

1. Step 1: Write the proportion equation
   76,308.36 : 105,303.56 = 42,316.30 : x
2. Step 2: Convert to fraction form
   76,308.36/105,303.56 = 42,316.30/x
3. Step 3: Cross multiply
   76,308.36x = 105,303.56 × 42,316.30
4. Step 4: Simplify right side
   76,308.36x = 4,456,057,036.03
5. Step 5: Solve for x
   x = 4,456,057,036.03/76,308.36
6. Step 6: Final answer
   x = 58,395.40