Finding the Fourth Proportional to 152,852.72, 210,936.84 and 85,784.72

Step by Step Solution

1. Step 1: Write the proportion equation
   152,852.72 : 210,936.84 = 85,784.72 : x
2. Step 2: Convert to fraction form
   152,852.72/210,936.84 = 85,784.72/x
3. Step 3: Cross multiply
   152,852.72x = 210,936.84 × 85,784.72
4. Step 4: Simplify right side
   152,852.72x = 18,095,157,757.08
5. Step 5: Solve for x
   x = 18,095,157,757.08/152,852.72
6. Step 6: Final answer
   x = 118,382.96