Finding the Fourth Proportional to 2,290,890.50, 3,161,428.92 and 1,272,390.02

Step by Step Solution

1. Step 1: Write the proportion equation
   2,290,890.50 : 3,161,428.92 = 1,272,390.02 : x
2. Step 2: Convert to fraction form
   2,290,890.50/3,161,428.92 = 1,272,390.02/x
3. Step 3: Cross multiply
   2,290,890.50x = 3,161,428.92 × 1,272,390.02
4. Step 4: Simplify right side
   2,290,890.50x = 4,022,570,606,747.38
5. Step 5: Solve for x
   x = 4,022,570,606,747.38/2,290,890.50
6. Step 6: Final answer
   x = 1,755,898.24