Finding the Fourth Proportional to 280,499,448.98, 387,081,814.28 and 156,741,143.06

Step by Step Solution

1. Step 1: Write the proportion equation
   280,499,448.98 : 387,081,814.28 = 156,741,143.06 : x
2. Step 2: Convert to fraction form
   280,499,448.98/387,081,814.28 = 156,741,143.06/x
3. Step 3: Cross multiply
   280,499,448.98x = 387,081,814.28 × 156,741,143.06
4. Step 4: Simplify right side
   280,499,448.98x = 60,671,646,027,985,824
5. Step 5: Solve for x
   x = 60,671,646,027,985,824/280,499,448.98
6. Step 6: Final answer
   x = 216,298,628.21