Finding the Fourth Proportional to 1,711,111.12, 2,566,659.69 and 431,721.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,711,111.12 : 2,566,659.69 = 431,721.58 : x
2. Step 2: Convert to fraction form
   1,711,111.12/2,566,659.69 = 431,721.58/x
3. Step 3: Cross multiply
   1,711,111.12x = 2,566,659.69 × 431,721.58
4. Step 4: Simplify right side
   1,711,111.12x = 1,108,082,376,689.11
5. Step 5: Solve for x
   x = 1,108,082,376,689.11/1,711,111.12
6. Step 6: Final answer
   x = 647,580.61