Finding the Fourth Proportional to 105,136.47, 144,915.48 and 74,519.82

Step by Step Solution

1. Step 1: Write the proportion equation
   105,136.47 : 144,915.48 = 74,519.82 : x
2. Step 2: Convert to fraction form
   105,136.47/144,915.48 = 74,519.82/x
3. Step 3: Cross multiply
   105,136.47x = 144,915.48 × 74,519.82
4. Step 4: Simplify right side
   105,136.47x = 10,799,075,484.81
5. Step 5: Solve for x
   x = 10,799,075,484.81/105,136.47
6. Step 6: Final answer
   x = 102,714.84