Finding the Fourth Proportional to 140,139.18, 193,602.69 and 91,855.71

Step by Step Solution

1. Step 1: Write the proportion equation
   140,139.18 : 193,602.69 = 91,855.71 : x
2. Step 2: Convert to fraction form
   140,139.18/193,602.69 = 91,855.71/x
3. Step 3: Cross multiply
   140,139.18x = 193,602.69 × 91,855.71
4. Step 4: Simplify right side
   140,139.18x = 17,783,512,547.86
5. Step 5: Solve for x
   x = 17,783,512,547.86/140,139.18
6. Step 6: Final answer
   x = 126,898.93