Finding the Fourth Proportional to 280,546,978.35, 387,166,786.71 and 156,787,651.83

Step by Step Solution

1. Step 1: Write the proportion equation
   280,546,978.35 : 387,166,786.71 = 156,787,651.83 : x
2. Step 2: Convert to fraction form
   280,546,978.35/387,166,786.71 = 156,787,651.83/x
3. Step 3: Cross multiply
   280,546,978.35x = 387,166,786.71 × 156,787,651.83
4. Step 4: Simplify right side
   280,546,978.35x = 60,702,971,354,827,352
5. Step 5: Solve for x
   x = 60,702,971,354,827,352/280,546,978.35
6. Step 6: Final answer
   x = 216,373,641.63