Finding the Fourth Proportional to 72,810.83, 109,899.99 and 72,810.83

Step by Step Solution

1. Step 1: Write the proportion equation
   72,810.83 : 109,899.99 = 72,810.83 : x
2. Step 2: Convert to fraction form
   72,810.83/109,899.99 = 72,810.83/x
3. Step 3: Cross multiply
   72,810.83x = 109,899.99 × 72,810.83
4. Step 4: Simplify right side
   72,810.83x = 8,001,909,763.64
5. Step 5: Solve for x
   x = 8,001,909,763.64/72,810.83
6. Step 6: Final answer
   x = 109,899.99