Finding the Fourth Proportional to 153,315.14, 230,019.72 and 78,488.30

Step by Step Solution

1. Step 1: Write the proportion equation
   153,315.14 : 230,019.72 = 78,488.30 : x
2. Step 2: Convert to fraction form
   153,315.14/230,019.72 = 78,488.30/x
3. Step 3: Cross multiply
   153,315.14x = 230,019.72 × 78,488.30
4. Step 4: Simplify right side
   153,315.14x = 18,053,856,789.28
5. Step 5: Solve for x
   x = 18,053,856,789.28/153,315.14
6. Step 6: Final answer
   x = 117,756.52