Finding the Fourth Proportional to 78,136.98, 107,830.44 and 42,328.50

Step by Step Solution

1. Step 1: Write the proportion equation
   78,136.98 : 107,830.44 = 42,328.50 : x
2. Step 2: Convert to fraction form
   78,136.98/107,830.44 = 42,328.50/x
3. Step 3: Cross multiply
   78,136.98x = 107,830.44 × 42,328.50
4. Step 4: Simplify right side
   78,136.98x = 4,564,300,779.54
5. Step 5: Solve for x
   x = 4,564,300,779.54/78,136.98
6. Step 6: Final answer
   x = 58,414.09