Finding the Fourth Proportional to 230,980.42, 346,470.61 and 86,913.31

Step by Step Solution

1. Step 1: Write the proportion equation
   230,980.42 : 346,470.61 = 86,913.31 : x
2. Step 2: Convert to fraction form
   230,980.42/346,470.61 = 86,913.31/x
3. Step 3: Cross multiply
   230,980.42x = 346,470.61 × 86,913.31
4. Step 4: Simplify right side
   230,980.42x = 30,112,907,532.82
5. Step 5: Solve for x
   x = 30,112,907,532.82/230,980.42
6. Step 6: Final answer
   x = 130,369.96