Finding the Fourth Proportional to 689,550.52, 951,287.34 and 421,123

Step by Step Solution

1. Step 1: Write the proportion equation
   689,550.52 : 951,287.34 = 421,123 : x
2. Step 2: Convert to fraction form
   689,550.52/951,287.34 = 421,123/x
3. Step 3: Cross multiply
   689,550.52x = 951,287.34 × 421,123
4. Step 4: Simplify right side
   689,550.52x = 400,608,978,482.82
5. Step 5: Solve for x
   x = 400,608,978,482.82/689,550.52
6. Step 6: Final answer
   x = 580,971.18