Finding the Fourth Proportional to 78,101.47, 117,127.99 and 28,175.08

Step by Step Solution

1. Step 1: Write the proportion equation
   78,101.47 : 117,127.99 = 28,175.08 : x
2. Step 2: Convert to fraction form
   78,101.47/117,127.99 = 28,175.08/x
3. Step 3: Cross multiply
   78,101.47x = 117,127.99 × 28,175.08
4. Step 4: Simplify right side
   78,101.47x = 3,300,090,450.50
5. Step 5: Solve for x
   x = 3,300,090,450.50/78,101.47
6. Step 6: Final answer
   x = 42,253.88