Finding the Fourth Proportional to 279,815.94, 386,134.72 and 152,488.80

Step by Step Solution

1. Step 1: Write the proportion equation
   279,815.94 : 386,134.72 = 152,488.80 : x
2. Step 2: Convert to fraction form
   279,815.94/386,134.72 = 152,488.80/x
3. Step 3: Cross multiply
   279,815.94x = 386,134.72 × 152,488.80
4. Step 4: Simplify right side
   279,815.94x = 58,881,220,091.14
5. Step 5: Solve for x
   x = 58,881,220,091.14/279,815.94
6. Step 6: Final answer
   x = 210,428.40