Finding the Fourth Proportional to 259,832,404.32, 389,504,478.96 and 87,188,145.72

Step by Step Solution

1. Step 1: Write the proportion equation
   259,832,404.32 : 389,504,478.96 = 87,188,145.72 : x
2. Step 2: Convert to fraction form
   259,832,404.32/389,504,478.96 = 87,188,145.72/x
3. Step 3: Cross multiply
   259,832,404.32x = 389,504,478.96 × 87,188,145.72
4. Step 4: Simplify right side
   259,832,404.32x = 33,960,173,270,157,152
5. Step 5: Solve for x
   x = 33,960,173,270,157,152/259,832,404.32
6. Step 6: Final answer
   x = 130,700,300.29