Finding the Fourth Proportional to 99,890.87, 149,813.82 and 28,798.18

Step by Step Solution

1. Step 1: Write the proportion equation
   99,890.87 : 149,813.82 = 28,798.18 : x
2. Step 2: Convert to fraction form
   99,890.87/149,813.82 = 28,798.18/x
3. Step 3: Cross multiply
   99,890.87x = 149,813.82 × 28,798.18
4. Step 4: Simplify right side
   99,890.87x = 4,314,364,980.31
5. Step 5: Solve for x
   x = 4,314,364,980.31/99,890.87
6. Step 6: Final answer
   x = 43,190.79