Finding the Fourth Proportional to 152,805.15, 210,870 and 84,819.78

Step by Step Solution

1. Step 1: Write the proportion equation
   152,805.15 : 210,870 = 84,819.78 : x
2. Step 2: Convert to fraction form
   152,805.15/210,870 = 84,819.78/x
3. Step 3: Cross multiply
   152,805.15x = 210,870 × 84,819.78
4. Step 4: Simplify right side
   152,805.15x = 17,885,947,008.60
5. Step 5: Solve for x
   x = 17,885,947,008.60/152,805.15
6. Step 6: Final answer
   x = 117,050.68