Finding the Fourth Proportional to 128,405,340, 192,567,550.50 and 42,123,641.04

Step by Step Solution

1. Step 1: Write the proportion equation
   128,405,340 : 192,567,550.50 = 42,123,641.04 : x
2. Step 2: Convert to fraction form
   128,405,340/192,567,550.50 = 42,123,641.04/x
3. Step 3: Cross multiply
   128,405,340x = 192,567,550.50 × 42,123,641.04
4. Step 4: Simplify right side
   128,405,340x = 8,111,646,373,214,072
5. Step 5: Solve for x
   x = 8,111,646,373,214,072/128,405,340
6. Step 6: Final answer
   x = 63,172,188.74