Finding the Fourth Proportional to 648,499.10, 973,915.05 and 471,206.30

Step by Step Solution

1. Step 1: Write the proportion equation
   648,499.10 : 973,915.05 = 471,206.30 : x
2. Step 2: Convert to fraction form
   648,499.10/973,915.05 = 471,206.30/x
3. Step 3: Cross multiply
   648,499.10x = 973,915.05 × 471,206.30
4. Step 4: Simplify right side
   648,499.10x = 458,914,907,224.82
5. Step 5: Solve for x
   x = 458,914,907,224.82/648,499.10
6. Step 6: Final answer
   x = 707,656.97