Finding the Fourth Proportional to 3,758,900.12, 5,638,350.18 and 918,978.56

Step by Step Solution

1. Step 1: Write the proportion equation
   3,758,900.12 : 5,638,350.18 = 918,978.56 : x
2. Step 2: Convert to fraction form
   3,758,900.12/5,638,350.18 = 918,978.56/x
3. Step 3: Cross multiply
   3,758,900.12x = 5,638,350.18 × 918,978.56
4. Step 4: Simplify right side
   3,758,900.12x = 5,181,522,929,192.14
5. Step 5: Solve for x
   x = 5,181,522,929,192.14/3,758,900.12
6. Step 6: Final answer
   x = 1,378,467.84