Finding the Fourth Proportional to 238,976.50, 358,430.15 and 70,488.50

Step by Step Solution

1. Step 1: Write the proportion equation
   238,976.50 : 358,430.15 = 70,488.50 : x
2. Step 2: Convert to fraction form
   238,976.50/358,430.15 = 70,488.50/x
3. Step 3: Cross multiply
   238,976.50x = 358,430.15 × 70,488.50
4. Step 4: Simplify right side
   238,976.50x = 25,265,204,028.52
5. Step 5: Solve for x
   x = 25,265,204,028.52/238,976.50
6. Step 6: Final answer
   x = 105,722.55