Finding the Fourth Proportional to 280,499,365.23, 387,081,698.72 and 156,741,059.31

Step by Step Solution

1. Step 1: Write the proportion equation
   280,499,365.23 : 387,081,698.72 = 156,741,059.31 : x
2. Step 2: Convert to fraction form
   280,499,365.23/387,081,698.72 = 156,741,059.31/x
3. Step 3: Cross multiply
   280,499,365.23x = 387,081,698.72 × 156,741,059.31
4. Step 4: Simplify right side
   280,499,365.23x = 60,671,595,496,103,360
5. Step 5: Solve for x
   x = 60,671,595,496,103,360/280,499,365.23
6. Step 6: Final answer
   x = 216,298,512.64