Finding the Fourth Proportional to 279,758.16, 386,061.40 and 152,434.80

Step by Step Solution

1. Step 1: Write the proportion equation
   279,758.16 : 386,061.40 = 152,434.80 : x
2. Step 2: Convert to fraction form
   279,758.16/386,061.40 = 152,434.80/x
3. Step 3: Cross multiply
   279,758.16x = 386,061.40 × 152,434.80
4. Step 4: Simplify right side
   279,758.16x = 58,849,192,296.72
5. Step 5: Solve for x
   x = 58,849,192,296.72/279,758.16
6. Step 6: Final answer
   x = 210,357.38