Finding the Fourth Proportional to 102,100.50, 140,898.69 and 57,388.50

Step by Step Solution

1. Step 1: Write the proportion equation
   102,100.50 : 140,898.69 = 57,388.50 : x
2. Step 2: Convert to fraction form
   102,100.50/140,898.69 = 57,388.50/x
3. Step 3: Cross multiply
   102,100.50x = 140,898.69 × 57,388.50
4. Step 4: Simplify right side
   102,100.50x = 8,085,964,471.07
5. Step 5: Solve for x
   x = 8,085,964,471.07/102,100.50
6. Step 6: Final answer
   x = 79,196.13