Finding the Fourth Proportional to 21,870.00, 32,810.20 and 7,078.91

Step by Step Solution

1. Step 1: Write the proportion equation
   21,870.00 : 32,810.20 = 7,078.91 : x
2. Step 2: Convert to fraction form
   21,870.00/32,810.20 = 7,078.91/x
3. Step 3: Cross multiply
   21,870.00x = 32,810.20 × 7,078.91
4. Step 4: Simplify right side
   21,870.00x = 232,260,534.91
5. Step 5: Solve for x
   x = 232,260,534.91/21,870.00
6. Step 6: Final answer
   x = 10,620.05