Finding the Fourth Proportional to 663,925,807.78, 995,892,503.72 and 275,748,638.34

Step by Step Solution

1. Step 1: Write the proportion equation
   663,925,807.78 : 995,892,503.72 = 275,748,638.34 : x
2. Step 2: Convert to fraction form
   663,925,807.78/995,892,503.72 = 275,748,638.34/x
3. Step 3: Cross multiply
   663,925,807.78x = 995,892,503.72 × 275,748,638.34
4. Step 4: Simplify right side
   663,925,807.78x = 274,616,001,833,803,360
5. Step 5: Solve for x
   x = 274,616,001,833,803,360/663,925,807.78
6. Step 6: Final answer
   x = 413,624,532.46