Finding the Fourth Proportional to 42,123.45, 58,153.71 and 28,714.41

Step by Step Solution

1. Step 1: Write the proportion equation
   42,123.45 : 58,153.71 = 28,714.41 : x
2. Step 2: Convert to fraction form
   42,123.45/58,153.71 = 28,714.41/x
3. Step 3: Cross multiply
   42,123.45x = 58,153.71 × 28,714.41
4. Step 4: Simplify right side
   42,123.45x = 1,669,849,579.64
5. Step 5: Solve for x
   x = 1,669,849,579.64/42,123.45
6. Step 6: Final answer
   x = 39,641.80