Finding the Fourth Proportional to 112,445.10, 155,159.25 and 72,213.37

Step by Step Solution

1. Step 1: Write the proportion equation
   112,445.10 : 155,159.25 = 72,213.37 : x
2. Step 2: Convert to fraction form
   112,445.10/155,159.25 = 72,213.37/x
3. Step 3: Cross multiply
   112,445.10x = 155,159.25 × 72,213.37
4. Step 4: Simplify right side
   112,445.10x = 11,204,571,670.47
5. Step 5: Solve for x
   x = 11,204,571,670.47/112,445.10
6. Step 6: Final answer
   x = 99,644.82