Finding the Fourth Proportional to 421,061.76, 631,566.72 and 140,555.52

Step by Step Solution

1. Step 1: Write the proportion equation
   421,061.76 : 631,566.72 = 140,555.52 : x
2. Step 2: Convert to fraction form
   421,061.76/631,566.72 = 140,555.52/x
3. Step 3: Cross multiply
   421,061.76x = 631,566.72 × 140,555.52
4. Step 4: Simplify right side
   421,061.76x = 88,770,188,744.29
5. Step 5: Solve for x
   x = 88,770,188,744.29/421,061.76
6. Step 6: Final answer
   x = 210,824.63