Finding the Fourth Proportional to 77,115.02, 106,457.42 and 72,994.34

Step by Step Solution

1. Step 1: Write the proportion equation
   77,115.02 : 106,457.42 = 72,994.34 : x
2. Step 2: Convert to fraction form
   77,115.02/106,457.42 = 72,994.34/x
3. Step 3: Cross multiply
   77,115.02x = 106,457.42 × 72,994.34
4. Step 4: Simplify right side
   77,115.02x = 7,770,789,111.00
5. Step 5: Solve for x
   x = 7,770,789,111.00/77,115.02
6. Step 6: Final answer
   x = 100,768.81