Finding the Fourth Proportional to 152,456.37, 210,405.36 and 87,928.12

Step by Step Solution

1. Step 1: Write the proportion equation
   152,456.37 : 210,405.36 = 87,928.12 : x
2. Step 2: Convert to fraction form
   152,456.37/210,405.36 = 87,928.12/x
3. Step 3: Cross multiply
   152,456.37x = 210,405.36 × 87,928.12
4. Step 4: Simplify right side
   152,456.37x = 18,500,547,742.72
5. Step 5: Solve for x
   x = 18,500,547,742.72/152,456.37
6. Step 6: Final answer
   x = 121,349.79