Finding the Fourth Proportional to 13,611,002.78, 18,783,609.10 and 7,810,845.50

Step by Step Solution

1. Step 1: Write the proportion equation
   13,611,002.78 : 18,783,609.10 = 7,810,845.50 : x
2. Step 2: Convert to fraction form
   13,611,002.78/18,783,609.10 = 7,810,845.50/x
3. Step 3: Cross multiply
   13,611,002.78x = 18,783,609.10 × 7,810,845.50
4. Step 4: Simplify right side
   13,611,002.78x = 146,715,868,499,048.91
5. Step 5: Solve for x
   x = 146,715,868,499,048.91/13,611,002.78
6. Step 6: Final answer
   x = 10,779,210.83