Finding the Fourth Proportional to 1,186,061.96, 1,636,758.63 and 642,186.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,186,061.96 : 1,636,758.63 = 642,186.52 : x
2. Step 2: Convert to fraction form
   1,186,061.96/1,636,758.63 = 642,186.52/x
3. Step 3: Cross multiply
   1,186,061.96x = 1,636,758.63 × 642,186.52
4. Step 4: Simplify right side
   1,186,061.96x = 1,051,104,324,587.77
5. Step 5: Solve for x
   x = 1,051,104,324,587.77/1,186,061.96
6. Step 6: Final answer
   x = 886,213.67