Finding the Fourth Proportional to 162,123, 243,185.58 and 51,315

Step by Step Solution

1. Step 1: Write the proportion equation
   162,123 : 243,185.58 = 51,315 : x
2. Step 2: Convert to fraction form
   162,123/243,185.58 = 51,315/x
3. Step 3: Cross multiply
   162,123x = 243,185.58 × 51,315
4. Step 4: Simplify right side
   162,123x = 12,479,068,037.70
5. Step 5: Solve for x
   x = 12,479,068,037.70/162,123
6. Step 6: Final answer
   x = 76,972.84