Finding the Fourth Proportional to 74,136.72, 102,310.38 and 42,308.58

Step by Step Solution

1. Step 1: Write the proportion equation
   74,136.72 : 102,310.38 = 42,308.58 : x
2. Step 2: Convert to fraction form
   74,136.72/102,310.38 = 42,308.58/x
3. Step 3: Cross multiply
   74,136.72x = 102,310.38 × 42,308.58
4. Step 4: Simplify right side
   74,136.72x = 4,328,606,897.06
5. Step 5: Solve for x
   x = 4,328,606,897.06/74,136.72
6. Step 6: Final answer
   x = 58,386.81