Finding the Fourth Proportional to 42,755,890.78, 64,144,465.29 and 12,464,020.06

Step by Step Solution

1. Step 1: Write the proportion equation
   42,755,890.78 : 64,144,465.29 = 12,464,020.06 : x
2. Step 2: Convert to fraction form
   42,755,890.78/64,144,465.29 = 12,464,020.06/x
3. Step 3: Cross multiply
   42,755,890.78x = 64,144,465.29 × 12,464,020.06
4. Step 4: Simplify right side
   42,755,890.78x = 799,497,902,112,533.75
5. Step 5: Solve for x
   x = 799,497,902,112,533.75/42,755,890.78
6. Step 6: Final answer
   x = 18,699,128.65