Finding the Fourth Proportional to 85,978,076.32, 128,943,174.52 and 28,474,831.32

Step by Step Solution

1. Step 1: Write the proportion equation
   85,978,076.32 : 128,943,174.52 = 28,474,831.32 : x
2. Step 2: Convert to fraction form
   85,978,076.32/128,943,174.52 = 28,474,831.32/x
3. Step 3: Cross multiply
   85,978,076.32x = 128,943,174.52 × 28,474,831.32
4. Step 4: Simplify right side
   85,978,076.32x = 3,671,635,144,322,322
5. Step 5: Solve for x
   x = 3,671,635,144,322,322/85,978,076.32
6. Step 6: Final answer
   x = 42,704,318.37