Finding the Fourth Proportional to 103,538.51, 142,530.54 and 76,630.31

Step by Step Solution

1. Step 1: Write the proportion equation
   103,538.51 : 142,530.54 = 76,630.31 : x
2. Step 2: Convert to fraction form
   103,538.51/142,530.54 = 76,630.31/x
3. Step 3: Cross multiply
   103,538.51x = 142,530.54 × 76,630.31
4. Step 4: Simplify right side
   103,538.51x = 10,922,159,464.67
5. Step 5: Solve for x
   x = 10,922,159,464.67/103,538.51
6. Step 6: Final answer
   x = 105,488.86