Finding the Fourth Proportional to 28,128,437.61, 42,194,289.33 and 10,856,734.49

Step by Step Solution

1. Step 1: Write the proportion equation
   28,128,437.61 : 42,194,289.33 = 10,856,734.49 : x
2. Step 2: Convert to fraction form
   28,128,437.61/42,194,289.33 = 10,856,734.49/x
3. Step 3: Cross multiply
   28,128,437.61x = 42,194,289.33 × 10,856,734.49
4. Step 4: Simplify right side
   28,128,437.61x = 458,092,196,039,078.50
5. Step 5: Solve for x
   x = 458,092,196,039,078.50/28,128,437.61
6. Step 6: Final answer
   x = 16,285,731.98