Finding the Fourth Proportional to 384,715.82, 530,935.31 and 212,630.10

Step by Step Solution

1. Step 1: Write the proportion equation
   384,715.82 : 530,935.31 = 212,630.10 : x
2. Step 2: Convert to fraction form
   384,715.82/530,935.31 = 212,630.10/x
3. Step 3: Cross multiply
   384,715.82x = 530,935.31 × 212,630.10
4. Step 4: Simplify right side
   384,715.82x = 112,892,826,599.40
5. Step 5: Solve for x
   x = 112,892,826,599.40/384,715.82
6. Step 6: Final answer
   x = 293,444.72