Finding the Fourth Proportional to 2,159,051.69, 2,978,415.18 and 1,287,271.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,159,051.69 : 2,978,415.18 = 1,287,271.55 : x
2. Step 2: Convert to fraction form
   2,159,051.69/2,978,415.18 = 1,287,271.55/x
3. Step 3: Cross multiply
   2,159,051.69x = 2,978,415.18 × 1,287,271.55
4. Step 4: Simplify right side
   2,159,051.69x = 3,834,029,132,748.17
5. Step 5: Solve for x
   x = 3,834,029,132,748.17/2,159,051.69
6. Step 6: Final answer
   x = 1,775,793.12