Finding the Fourth Proportional to 256,828.32, 385,146.69 and 88,300.93

Step by Step Solution

1. Step 1: Write the proportion equation
   256,828.32 : 385,146.69 = 88,300.93 : x
2. Step 2: Convert to fraction form
   256,828.32/385,146.69 = 88,300.93/x
3. Step 3: Cross multiply
   256,828.32x = 385,146.69 × 88,300.93
4. Step 4: Simplify right side
   256,828.32x = 34,008,810,913.42
5. Step 5: Solve for x
   x = 34,008,810,913.42/256,828.32
6. Step 6: Final answer
   x = 132,418.46