Finding the Fourth Proportional to 280,499,445.86, 387,081,809.98 and 156,741,139.94

Step by Step Solution

1. Step 1: Write the proportion equation
   280,499,445.86 : 387,081,809.98 = 156,741,139.94 : x
2. Step 2: Convert to fraction form
   280,499,445.86/387,081,809.98 = 156,741,139.94/x
3. Step 3: Cross multiply
   280,499,445.86x = 387,081,809.98 × 156,741,139.94
4. Step 4: Simplify right side
   280,499,445.86x = 60,671,644,143,976,408
5. Step 5: Solve for x
   x = 60,671,644,143,976,408/280,499,445.86
6. Step 6: Final answer
   x = 216,298,623.90