Finding the Fourth Proportional to 256,317,667.02, 353,720,078.82 and 138,842,997.26

Step by Step Solution

1. Step 1: Write the proportion equation
   256,317,667.02 : 353,720,078.82 = 138,842,997.26 : x
2. Step 2: Convert to fraction form
   256,317,667.02/353,720,078.82 = 138,842,997.26/x
3. Step 3: Cross multiply
   256,317,667.02x = 353,720,078.82 × 138,842,997.26
4. Step 4: Simplify right side
   256,317,667.02x = 49,111,555,932,643,640
5. Step 5: Solve for x
   x = 49,111,555,932,643,640/256,317,667.02
6. Step 6: Final answer
   x = 191,604,256.17