Finding the Fourth Proportional to 1,405,075.56, 1,939,051.20 and 861,106.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,405,075.56 : 1,939,051.20 = 861,106.32 : x
2. Step 2: Convert to fraction form
   1,405,075.56/1,939,051.20 = 861,106.32/x
3. Step 3: Cross multiply
   1,405,075.56x = 1,939,051.20 × 861,106.32
4. Step 4: Simplify right side
   1,405,075.56x = 1,669,729,243,123.58
5. Step 5: Solve for x
   x = 1,669,729,243,123.58/1,405,075.56
6. Step 6: Final answer
   x = 1,188,355.48