Finding the Fourth Proportional to 1,218,238.57, 1,818,638.81 and 1,058,850.01

Step by Step Solution

1. Step 1: Write the proportion equation
   1,218,238.57 : 1,818,638.81 = 1,058,850.01 : x
2. Step 2: Convert to fraction form
   1,218,238.57/1,818,638.81 = 1,058,850.01/x
3. Step 3: Cross multiply
   1,218,238.57x = 1,818,638.81 × 1,058,850.01
4. Step 4: Simplify right side
   1,218,238.57x = 1,925,665,722,154.89
5. Step 5: Solve for x
   x = 1,925,665,722,154.89/1,218,238.57
6. Step 6: Final answer
   x = 1,580,696.73