Finding the Fourth Proportional to 31,007,789.21, 42,791,293.27 and 16,879,381.93

Step by Step Solution

1. Step 1: Write the proportion equation
   31,007,789.21 : 42,791,293.27 = 16,879,381.93 : x
2. Step 2: Convert to fraction form
   31,007,789.21/42,791,293.27 = 16,879,381.93/x
3. Step 3: Cross multiply
   31,007,789.21x = 42,791,293.27 × 16,879,381.93
4. Step 4: Simplify right side
   31,007,789.21x = 722,290,582,457,556.88
5. Step 5: Solve for x
   x = 722,290,582,457,556.88/31,007,789.21
6. Step 6: Final answer
   x = 23,293,843.28