Finding the Fourth Proportional to 624,196.72, 860,607.24 and 509,358.72

Step by Step Solution

1. Step 1: Write the proportion equation
   624,196.72 : 860,607.24 = 509,358.72 : x
2. Step 2: Convert to fraction form
   624,196.72/860,607.24 = 509,358.72/x
3. Step 3: Cross multiply
   624,196.72x = 860,607.24 × 509,358.72
4. Step 4: Simplify right side
   624,196.72x = 438,357,802,189.13
5. Step 5: Solve for x
   x = 438,357,802,189.13/624,196.72
6. Step 6: Final answer
   x = 702,275.08