Finding the Fourth Proportional to 857,221.10, 1,182,978.72 and 470,071.74

Step by Step Solution

1. Step 1: Write the proportion equation
   857,221.10 : 1,182,978.72 = 470,071.74 : x
2. Step 2: Convert to fraction form
   857,221.10/1,182,978.72 = 470,071.74/x
3. Step 3: Cross multiply
   857,221.10x = 1,182,978.72 × 470,071.74
4. Step 4: Simplify right side
   857,221.10x = 556,084,869,729.54
5. Step 5: Solve for x
   x = 556,084,869,729.54/857,221.10
6. Step 6: Final answer
   x = 648,706.47