Finding the Fourth Proportional to 78,253.48, 107,990.10 and 42,443.80

Step by Step Solution

1. Step 1: Write the proportion equation
   78,253.48 : 107,990.10 = 42,443.80 : x
2. Step 2: Convert to fraction form
   78,253.48/107,990.10 = 42,443.80/x
3. Step 3: Cross multiply
   78,253.48x = 107,990.10 × 42,443.80
4. Step 4: Simplify right side
   78,253.48x = 4,583,510,206.38
5. Step 5: Solve for x
   x = 4,583,510,206.38/78,253.48
6. Step 6: Final answer
   x = 58,572.61