Finding the Fourth Proportional to 152,868.96, 210,947.60 and 85,788

Step by Step Solution

1. Step 1: Write the proportion equation
   152,868.96 : 210,947.60 = 85,788 : x
2. Step 2: Convert to fraction form
   152,868.96/210,947.60 = 85,788/x
3. Step 3: Cross multiply
   152,868.96x = 210,947.60 × 85,788
4. Step 4: Simplify right side
   152,868.96x = 18,096,772,708.80
5. Step 5: Solve for x
   x = 18,096,772,708.80/152,868.96
6. Step 6: Final answer
   x = 118,380.95