Finding the Fourth Proportional to 76,339, 105,347.82 and 42,805

Step by Step Solution

1. Step 1: Write the proportion equation
   76,339 : 105,347.82 = 42,805 : x
2. Step 2: Convert to fraction form
   76,339/105,347.82 = 42,805/x
3. Step 3: Cross multiply
   76,339x = 105,347.82 × 42,805
4. Step 4: Simplify right side
   76,339x = 4,509,413,435.10
5. Step 5: Solve for x
   x = 4,509,413,435.10/76,339
6. Step 6: Final answer
   x = 59,070.90