Finding the Fourth Proportional to 110,112.10, 151,978.89 and 72,389.86

Step by Step Solution

1. Step 1: Write the proportion equation
   110,112.10 : 151,978.89 = 72,389.86 : x
2. Step 2: Convert to fraction form
   110,112.10/151,978.89 = 72,389.86/x
3. Step 3: Cross multiply
   110,112.10x = 151,978.89 × 72,389.86
4. Step 4: Simplify right side
   110,112.10x = 11,001,730,570.06
5. Step 5: Solve for x
   x = 11,001,730,570.06/110,112.10
6. Step 6: Final answer
   x = 99,913.91