Finding the Fourth Proportional to 1,186,061.05, 1,779,200.79 and 387,346.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,186,061.05 : 1,779,200.79 = 387,346.78 : x
2. Step 2: Convert to fraction form
   1,186,061.05/1,779,200.79 = 387,346.78/x
3. Step 3: Cross multiply
   1,186,061.05x = 1,779,200.79 × 387,346.78
4. Step 4: Simplify right side
   1,186,061.05x = 689,167,696,979.96
5. Step 5: Solve for x
   x = 689,167,696,979.96/1,186,061.05
6. Step 6: Final answer
   x = 581,055.84