Finding the Fourth Proportional to 110,111.35, 151,977.86 and 72,389.11

Step by Step Solution

1. Step 1: Write the proportion equation
   110,111.35 : 151,977.86 = 72,389.11 : x
2. Step 2: Convert to fraction form
   110,111.35/151,977.86 = 72,389.11/x
3. Step 3: Cross multiply
   110,111.35x = 151,977.86 × 72,389.11
4. Step 4: Simplify right side
   110,111.35x = 11,001,541,663.16
5. Step 5: Solve for x
   x = 11,001,541,663.16/110,111.35
6. Step 6: Final answer
   x = 99,912.88