Finding the Fourth Proportional to 98,642.69, 148,074.59 and 39,519.57

Step by Step Solution

1. Step 1: Write the proportion equation
   98,642.69 : 148,074.59 = 39,519.57 : x
2. Step 2: Convert to fraction form
   98,642.69/148,074.59 = 39,519.57/x
3. Step 3: Cross multiply
   98,642.69x = 148,074.59 × 39,519.57
4. Step 4: Simplify right side
   98,642.69x = 5,851,844,223.53
5. Step 5: Solve for x
   x = 5,851,844,223.53/98,642.69
6. Step 6: Final answer
   x = 59,323.65