Finding the Fourth Proportional to 1,218,111.84, 1,680,607.82 and 708,715.80

Step by Step Solution

1. Step 1: Write the proportion equation
   1,218,111.84 : 1,680,607.82 = 708,715.80 : x
2. Step 2: Convert to fraction form
   1,218,111.84/1,680,607.82 = 708,715.80/x
3. Step 3: Cross multiply
   1,218,111.84x = 1,680,607.82 × 708,715.80
4. Step 4: Simplify right side
   1,218,111.84x = 1,191,073,315,637.56
5. Step 5: Solve for x
   x = 1,191,073,315,637.56/1,218,111.84
6. Step 6: Final answer
   x = 977,802.92