Finding the Fourth Proportional to 280,499,442.48, 387,081,805.32 and 156,741,136.56

Step by Step Solution

1. Step 1: Write the proportion equation
   280,499,442.48 : 387,081,805.32 = 156,741,136.56 : x
2. Step 2: Convert to fraction form
   280,499,442.48/387,081,805.32 = 156,741,136.56/x
3. Step 3: Cross multiply
   280,499,442.48x = 387,081,805.32 × 156,741,136.56
4. Step 4: Simplify right side
   280,499,442.48x = 60,671,642,107,553,456
5. Step 5: Solve for x
   x = 60,671,642,107,553,456/280,499,442.48
6. Step 6: Final answer
   x = 216,298,619.25