Finding the Fourth Proportional to 42,928.32, 64,303.84 and 31,847.52

Step by Step Solution

1. Step 1: Write the proportion equation
   42,928.32 : 64,303.84 = 31,847.52 : x
2. Step 2: Convert to fraction form
   42,928.32/64,303.84 = 31,847.52/x
3. Step 3: Cross multiply
   42,928.32x = 64,303.84 × 31,847.52
4. Step 4: Simplify right side
   42,928.32x = 2,047,917,830.48
5. Step 5: Solve for x
   x = 2,047,917,830.48/42,928.32
6. Step 6: Final answer
   x = 47,705.52