Finding the Fourth Proportional to 76,203, 105,160.50 and 42,669

Step by Step Solution

1. Step 1: Write the proportion equation
   76,203 : 105,160.50 = 42,669 : x
2. Step 2: Convert to fraction form
   76,203/105,160.50 = 42,669/x
3. Step 3: Cross multiply
   76,203x = 105,160.50 × 42,669
4. Step 4: Simplify right side
   76,203x = 4,487,093,374.50
5. Step 5: Solve for x
   x = 4,487,093,374.50/76,203
6. Step 6: Final answer
   x = 58,883.42