Finding the Fourth Proportional to 77,890.41, 107,488.82 and 42,080.38

Step by Step Solution

1. Step 1: Write the proportion equation
   77,890.41 : 107,488.82 = 42,080.38 : x
2. Step 2: Convert to fraction form
   77,890.41/107,488.82 = 42,080.38/x
3. Step 3: Cross multiply
   77,890.41x = 107,488.82 × 42,080.38
4. Step 4: Simplify right side
   77,890.41x = 4,523,170,227.83
5. Step 5: Solve for x
   x = 4,523,170,227.83/77,890.41
6. Step 6: Final answer
   x = 58,070.95