Finding the Fourth Proportional to 99,470.92, 149,211.34 and 28,404.10

Step by Step Solution

1. Step 1: Write the proportion equation
   99,470.92 : 149,211.34 = 28,404.10 : x
2. Step 2: Convert to fraction form
   99,470.92/149,211.34 = 28,404.10/x
3. Step 3: Cross multiply
   99,470.92x = 149,211.34 × 28,404.10
4. Step 4: Simplify right side
   99,470.92x = 4,238,213,822.49
5. Step 5: Solve for x
   x = 4,238,213,822.49/99,470.92
6. Step 6: Final answer
   x = 42,607.57