Finding the Fourth Proportional to 102,042.06, 140,886.72 and 91,253.40

Step by Step Solution

1. Step 1: Write the proportion equation
   102,042.06 : 140,886.72 = 91,253.40 : x
2. Step 2: Convert to fraction form
   102,042.06/140,886.72 = 91,253.40/x
3. Step 3: Cross multiply
   102,042.06x = 140,886.72 × 91,253.40
4. Step 4: Simplify right side
   102,042.06x = 12,856,392,214.85
5. Step 5: Solve for x
   x = 12,856,392,214.85/102,042.06
6. Step 6: Final answer
   x = 125,991.11