Finding the Fourth Proportional to 49,991.60, 69,005.78 and 28,779.32

Step by Step Solution

1. Step 1: Write the proportion equation
   49,991.60 : 69,005.78 = 28,779.32 : x
2. Step 2: Convert to fraction form
   49,991.60/69,005.78 = 28,779.32/x
3. Step 3: Cross multiply
   49,991.60x = 69,005.78 × 28,779.32
4. Step 4: Simplify right side
   49,991.60x = 1,985,938,935.54
5. Step 5: Solve for x
   x = 1,985,938,935.54/49,991.60
6. Step 6: Final answer
   x = 39,725.46