Finding the Fourth Proportional to 42,680,309.77, 64,032,451.83 and 17,139,255.31

Step by Step Solution

1. Step 1: Write the proportion equation
   42,680,309.77 : 64,032,451.83 = 17,139,255.31 : x
2. Step 2: Convert to fraction form
   42,680,309.77/64,032,451.83 = 17,139,255.31/x
3. Step 3: Cross multiply
   42,680,309.77x = 64,032,451.83 × 17,139,255.31
4. Step 4: Simplify right side
   42,680,309.77x = 1,097,468,539,719,484.38
5. Step 5: Solve for x
   x = 1,097,468,539,719,484.38/42,680,309.77
6. Step 6: Final answer
   x = 25,713,696.69