Finding the Fourth Proportional to 76,823.60, 115,189.32 and 30,020.72

Step by Step Solution

1. Step 1: Write the proportion equation
   76,823.60 : 115,189.32 = 30,020.72 : x
2. Step 2: Convert to fraction form
   76,823.60/115,189.32 = 30,020.72/x
3. Step 3: Cross multiply
   76,823.60x = 115,189.32 × 30,020.72
4. Step 4: Simplify right side
   76,823.60x = 3,458,066,322.71
5. Step 5: Solve for x
   x = 3,458,066,322.71/76,823.60
6. Step 6: Final answer
   x = 45,013.07