Finding the Fourth Proportional to 488,157,802.45, 673,662,715.69 and 265,141,638.88

Step by Step Solution

1. Step 1: Write the proportion equation
   488,157,802.45 : 673,662,715.69 = 265,141,638.88 : x
2. Step 2: Convert to fraction form
   488,157,802.45/673,662,715.69 = 265,141,638.88/x
3. Step 3: Cross multiply
   488,157,802.45x = 673,662,715.69 × 265,141,638.88
4. Step 4: Simplify right side
   488,157,802.45x = 178,616,036,488,051,072
5. Step 5: Solve for x
   x = 178,616,036,488,051,072/488,157,802.45
6. Step 6: Final answer
   x = 365,898,149.31