Finding the Fourth Proportional to 2,154,086.80, 2,972,518.50 and 1,187,214.16

Step by Step Solution

1. Step 1: Write the proportion equation
   2,154,086.80 : 2,972,518.50 = 1,187,214.16 : x
2. Step 2: Convert to fraction form
   2,154,086.80/2,972,518.50 = 1,187,214.16/x
3. Step 3: Cross multiply
   2,154,086.80x = 2,972,518.50 × 1,187,214.16
4. Step 4: Simplify right side
   2,154,086.80x = 3,529,016,054,061.96
5. Step 5: Solve for x
   x = 3,529,016,054,061.96/2,154,086.80
6. Step 6: Final answer
   x = 1,638,288.70