Finding the Fourth Proportional to 1,112,912.02, 1,669,534.71 and 403,105.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,112,912.02 : 1,669,534.71 = 403,105.78 : x
2. Step 2: Convert to fraction form
   1,112,912.02/1,669,534.71 = 403,105.78/x
3. Step 3: Cross multiply
   1,112,912.02x = 1,669,534.71 × 403,105.78
4. Step 4: Simplify right side
   1,112,912.02x = 672,999,091,511.62
5. Step 5: Solve for x
   x = 672,999,091,511.62/1,112,912.02
6. Step 6: Final answer
   x = 604,719.04