Finding the Fourth Proportional to 2,111,326.46, 2,916,051.89 and 1,389,397.07

Step by Step Solution

1. Step 1: Write the proportion equation
   2,111,326.46 : 2,916,051.89 = 1,389,397.07 : x
2. Step 2: Convert to fraction form
   2,111,326.46/2,916,051.89 = 1,389,397.07/x
3. Step 3: Cross multiply
   2,111,326.46x = 2,916,051.89 × 1,389,397.07
4. Step 4: Simplify right side
   2,111,326.46x = 4,051,553,930,406.72
5. Step 5: Solve for x
   x = 4,051,553,930,406.72/2,111,326.46
6. Step 6: Final answer
   x = 1,918,961.38