Finding the Fourth Proportional to 2,645,317.72, 3,968,487.30 and 1,128,978.52

Step by Step Solution

1. Step 1: Write the proportion equation
   2,645,317.72 : 3,968,487.30 = 1,128,978.52 : x
2. Step 2: Convert to fraction form
   2,645,317.72/3,968,487.30 = 1,128,978.52/x
3. Step 3: Cross multiply
   2,645,317.72x = 3,968,487.30 × 1,128,978.52
4. Step 4: Simplify right side
   2,645,317.72x = 4,480,336,918,592.80
5. Step 5: Solve for x
   x = 4,480,336,918,592.80/2,645,317.72
6. Step 6: Final answer
   x = 1,693,685.75