Finding the Fourth Proportional to 128,405,443.13, 192,567,705.12 and 42,123,744.17

Step by Step Solution

1. Step 1: Write the proportion equation
   128,405,443.13 : 192,567,705.12 = 42,123,744.17 : x
2. Step 2: Convert to fraction form
   128,405,443.13/192,567,705.12 = 42,123,744.17/x
3. Step 3: Cross multiply
   128,405,443.13x = 192,567,705.12 × 42,123,744.17
4. Step 4: Simplify right side
   128,405,443.13x = 8,111,672,744,916,041
5. Step 5: Solve for x
   x = 8,111,672,744,916,041/128,405,443.13
6. Step 6: Final answer
   x = 63,172,343.38