Finding the Fourth Proportional to 279,117.59, 418,486.86 and 142,003.69

Step by Step Solution

1. Step 1: Write the proportion equation
   279,117.59 : 418,486.86 = 142,003.69 : x
2. Step 2: Convert to fraction form
   279,117.59/418,486.86 = 142,003.69/x
3. Step 3: Cross multiply
   279,117.59x = 418,486.86 × 142,003.69
4. Step 4: Simplify right side
   279,117.59x = 59,426,677,290.30
5. Step 5: Solve for x
   x = 59,426,677,290.30/279,117.59
6. Step 6: Final answer
   x = 212,909.11