Finding the Fourth Proportional to 103,540.01, 142,532.61 and 76,631.81

Step by Step Solution

1. Step 1: Write the proportion equation
   103,540.01 : 142,532.61 = 76,631.81 : x
2. Step 2: Convert to fraction form
   103,540.01/142,532.61 = 76,631.81/x
3. Step 3: Cross multiply
   103,540.01x = 142,532.61 × 76,631.81
4. Step 4: Simplify right side
   103,540.01x = 10,922,531,888.32
5. Step 5: Solve for x
   x = 10,922,531,888.32/103,540.01
6. Step 6: Final answer
   x = 105,490.93