Finding the Fourth Proportional to 764,854.71, 1,055,501.61 and 420,725.89

Step by Step Solution

1. Step 1: Write the proportion equation
   764,854.71 : 1,055,501.61 = 420,725.89 : x
2. Step 2: Convert to fraction form
   764,854.71/1,055,501.61 = 420,725.89/x
3. Step 3: Cross multiply
   764,854.71x = 1,055,501.61 × 420,725.89
4. Step 4: Simplify right side
   764,854.71x = 444,076,854,005.34
5. Step 5: Solve for x
   x = 444,076,854,005.34/764,854.71
6. Step 6: Final answer
   x = 580,602.89