Finding the Fourth Proportional to 272,443.33, 408,700.72 and 90,013.55

Step by Step Solution

1. Step 1: Write the proportion equation
   272,443.33 : 408,700.72 = 90,013.55 : x
2. Step 2: Convert to fraction form
   272,443.33/408,700.72 = 90,013.55/x
3. Step 3: Cross multiply
   272,443.33x = 408,700.72 × 90,013.55
4. Step 4: Simplify right side
   272,443.33x = 36,788,600,763.77
5. Step 5: Solve for x
   x = 36,788,600,763.77/272,443.33
6. Step 6: Final answer
   x = 135,032.12