Finding the Fourth Proportional to 103,554.03, 142,942.70 and 90,941.54

Step by Step Solution

1. Step 1: Write the proportion equation
   103,554.03 : 142,942.70 = 90,941.54 : x
2. Step 2: Convert to fraction form
   103,554.03/142,942.70 = 90,941.54/x
3. Step 3: Cross multiply
   103,554.03x = 142,942.70 × 90,941.54
4. Step 4: Simplify right side
   103,554.03x = 12,999,428,100.34
5. Step 5: Solve for x
   x = 12,999,428,100.34/103,554.03
6. Step 6: Final answer
   x = 125,532.81