Finding the Fourth Proportional to 518,565, 777,978.72 and 144,588

Step by Step Solution

1. Step 1: Write the proportion equation
   518,565 : 777,978.72 = 144,588 : x
2. Step 2: Convert to fraction form
   518,565/777,978.72 = 144,588/x
3. Step 3: Cross multiply
   518,565x = 777,978.72 × 144,588
4. Step 4: Simplify right side
   518,565x = 112,486,387,167.36
5. Step 5: Solve for x
   x = 112,486,387,167.36/518,565
6. Step 6: Final answer
   x = 216,918.59