Finding the Fourth Proportional to 103,401.01, 155,112.30 and 28,521.17

Step by Step Solution

1. Step 1: Write the proportion equation
   103,401.01 : 155,112.30 = 28,521.17 : x
2. Step 2: Convert to fraction form
   103,401.01/155,112.30 = 28,521.17/x
3. Step 3: Cross multiply
   103,401.01x = 155,112.30 × 28,521.17
4. Step 4: Simplify right side
   103,401.01x = 4,423,983,501.83
5. Step 5: Solve for x
   x = 4,423,983,501.83/103,401.01
6. Step 6: Final answer
   x = 42,784.72