Finding the Fourth Proportional to 11,028,978.10, 16,543,467.15 and 8,478,061.30

Step by Step Solution

1. Step 1: Write the proportion equation
   11,028,978.10 : 16,543,467.15 = 8,478,061.30 : x
2. Step 2: Convert to fraction form
   11,028,978.10/16,543,467.15 = 8,478,061.30/x
3. Step 3: Cross multiply
   11,028,978.10x = 16,543,467.15 × 8,478,061.30
4. Step 4: Simplify right side
   11,028,978.10x = 140,256,528,612,236.31
5. Step 5: Solve for x
   x = 140,256,528,612,236.31/11,028,978.10
6. Step 6: Final answer
   x = 12,717,091.95