Finding the Fourth Proportional to 2,290,743.40, 3,161,139.29 and 1,272,213.76

Step by Step Solution

1. Step 1: Write the proportion equation
   2,290,743.40 : 3,161,139.29 = 1,272,213.76 : x
2. Step 2: Convert to fraction form
   2,290,743.40/3,161,139.29 = 1,272,213.76/x
3. Step 3: Cross multiply
   2,290,743.40x = 3,161,139.29 × 1,272,213.76
4. Step 4: Simplify right side
   2,290,743.40x = 4,021,644,894,870.55
5. Step 5: Solve for x
   x = 4,021,644,894,870.55/2,290,743.40
6. Step 6: Final answer
   x = 1,755,606.89