Finding the Fourth Proportional to 100,114.83, 138,111.78 and 57,648.75

Step by Step Solution

1. Step 1: Write the proportion equation
   100,114.83 : 138,111.78 = 57,648.75 : x
2. Step 2: Convert to fraction form
   100,114.83/138,111.78 = 57,648.75/x
3. Step 3: Cross multiply
   100,114.83x = 138,111.78 × 57,648.75
4. Step 4: Simplify right side
   100,114.83x = 7,961,971,477.28
5. Step 5: Solve for x
   x = 7,961,971,477.28/100,114.83
6. Step 6: Final answer
   x = 79,528.39