Finding the Fourth Proportional to 377,460.50, 566,278.23 and 128,142.50

Step by Step Solution

1. Step 1: Write the proportion equation
   377,460.50 : 566,278.23 = 128,142.50 : x
2. Step 2: Convert to fraction form
   377,460.50/566,278.23 = 128,142.50/x
3. Step 3: Cross multiply
   377,460.50x = 566,278.23 × 128,142.50
4. Step 4: Simplify right side
   377,460.50x = 72,564,308,087.78
5. Step 5: Solve for x
   x = 72,564,308,087.78/377,460.50
6. Step 6: Final answer
   x = 192,243.45