Finding the Fourth Proportional to 384,931.79, 531,159.50 and 212,826.50

Step by Step Solution

1. Step 1: Write the proportion equation
   384,931.79 : 531,159.50 = 212,826.50 : x
2. Step 2: Convert to fraction form
   384,931.79/531,159.50 = 212,826.50/x
3. Step 3: Cross multiply
   384,931.79x = 531,159.50 × 212,826.50
4. Step 4: Simplify right side
   384,931.79x = 113,044,813,606.82
5. Step 5: Solve for x
   x = 113,044,813,606.82/384,931.79
6. Step 6: Final answer
   x = 293,674.93