Finding the Fourth Proportional to 279,815.95, 386,134.71 and 152,488.81

Step by Step Solution

1. Step 1: Write the proportion equation
   279,815.95 : 386,134.71 = 152,488.81 : x
2. Step 2: Convert to fraction form
   279,815.95/386,134.71 = 152,488.81/x
3. Step 3: Cross multiply
   279,815.95x = 386,134.71 × 152,488.81
4. Step 4: Simplify right side
   279,815.95x = 58,881,222,427.60
5. Step 5: Solve for x
   x = 58,881,222,427.60/279,815.95
6. Step 6: Final answer
   x = 210,428.40