Finding the Fourth Proportional to 384,811.87, 530,994.38 and 212,706.59

Step by Step Solution

1. Step 1: Write the proportion equation
   384,811.87 : 530,994.38 = 212,706.59 : x
2. Step 2: Convert to fraction form
   384,811.87/530,994.38 = 212,706.59/x
3. Step 3: Cross multiply
   384,811.87x = 530,994.38 × 212,706.59
4. Step 4: Simplify right side
   384,811.87x = 112,946,002,019.71
5. Step 5: Solve for x
   x = 112,946,002,019.71/384,811.87
6. Step 6: Final answer
   x = 293,509.66