Finding the Fourth Proportional to 280,499,448.48, 387,081,813.60 and 156,741,142.56

Step by Step Solution

1. Step 1: Write the proportion equation
   280,499,448.48 : 387,081,813.60 = 156,741,142.56 : x
2. Step 2: Convert to fraction form
   280,499,448.48/387,081,813.60 = 156,741,142.56/x
3. Step 3: Cross multiply
   280,499,448.48x = 387,081,813.60 × 156,741,142.56
4. Step 4: Simplify right side
   280,499,448.48x = 60,671,645,727,860,952
5. Step 5: Solve for x
   x = 60,671,645,727,860,952/280,499,448.48
6. Step 6: Final answer
   x = 216,298,627.53