Finding the Fourth Proportional to 74,136.72, 102,307.52 and 42,304.80

Step by Step Solution

1. Step 1: Write the proportion equation
   74,136.72 : 102,307.52 = 42,304.80 : x
2. Step 2: Convert to fraction form
   74,136.72/102,307.52 = 42,304.80/x
3. Step 3: Cross multiply
   74,136.72x = 102,307.52 × 42,304.80
4. Step 4: Simplify right side
   74,136.72x = 4,328,099,172.10
5. Step 5: Solve for x
   x = 4,328,099,172.10/74,136.72
6. Step 6: Final answer
   x = 58,379.97