Finding the Fourth Proportional to 47,091.40, 64,985.86 and 25,870.21

Step by Step Solution

1. Step 1: Write the proportion equation
   47,091.40 : 64,985.86 = 25,870.21 : x
2. Step 2: Convert to fraction form
   47,091.40/64,985.86 = 25,870.21/x
3. Step 3: Cross multiply
   47,091.40x = 64,985.86 × 25,870.21
4. Step 4: Simplify right side
   47,091.40x = 1,681,197,715.10
5. Step 5: Solve for x
   x = 1,681,197,715.10/47,091.40
6. Step 6: Final answer
   x = 35,700.74