Finding the Fourth Proportional to 384,141.40, 530,111.70 and 212,061.40

Step by Step Solution

1. Step 1: Write the proportion equation
   384,141.40 : 530,111.70 = 212,061.40 : x
2. Step 2: Convert to fraction form
   384,141.40/530,111.70 = 212,061.40/x
3. Step 3: Cross multiply
   384,141.40x = 530,111.70 × 212,061.40
4. Step 4: Simplify right side
   384,141.40x = 112,416,229,258.38
5. Step 5: Solve for x
   x = 112,416,229,258.38/384,141.40
6. Step 6: Final answer
   x = 292,642.84