Finding the Fourth Proportional to 140,280.48, 193,583.94 and 76,618.50

Step by Step Solution

1. Step 1: Write the proportion equation
   140,280.48 : 193,583.94 = 76,618.50 : x
2. Step 2: Convert to fraction form
   140,280.48/193,583.94 = 76,618.50/x
3. Step 3: Cross multiply
   140,280.48x = 193,583.94 × 76,618.50
4. Step 4: Simplify right side
   140,280.48x = 14,832,111,106.89
5. Step 5: Solve for x
   x = 14,832,111,106.89/140,280.48
6. Step 6: Final answer
   x = 105,731.82