Finding the Fourth Proportional to 9,986,859.62, 13,781,861.61 and 5,636,858.30

Step by Step Solution

1. Step 1: Write the proportion equation
   9,986,859.62 : 13,781,861.61 = 5,636,858.30 : x
2. Step 2: Convert to fraction form
   9,986,859.62/13,781,861.61 = 5,636,858.30/x
3. Step 3: Cross multiply
   9,986,859.62x = 13,781,861.61 × 5,636,858.30
4. Step 4: Simplify right side
   9,986,859.62x = 77,686,401,005,779.86
5. Step 5: Solve for x
   x = 77,686,401,005,779.86/9,986,859.62
6. Step 6: Final answer
   x = 7,778,861.82