Finding the Fourth Proportional to 42,680,333.07, 64,032,486.80 and 17,139,278.61

Step by Step Solution

1. Step 1: Write the proportion equation
   42,680,333.07 : 64,032,486.80 = 17,139,278.61 : x
2. Step 2: Convert to fraction form
   42,680,333.07/64,032,486.80 = 17,139,278.61/x
3. Step 3: Cross multiply
   42,680,333.07x = 64,032,486.80 × 17,139,278.61
4. Step 4: Simplify right side
   42,680,333.07x = 1,097,470,631,270,651
5. Step 5: Solve for x
   x = 1,097,470,631,270,651/42,680,333.07
6. Step 6: Final answer
   x = 25,713,731.65