Finding the Fourth Proportional to 112,743.32, 155,510.88 and 72,507.96

Step by Step Solution

1. Step 1: Write the proportion equation
   112,743.32 : 155,510.88 = 72,507.96 : x
2. Step 2: Convert to fraction form
   112,743.32/155,510.88 = 72,507.96/x
3. Step 3: Cross multiply
   112,743.32x = 155,510.88 × 72,507.96
4. Step 4: Simplify right side
   112,743.32x = 11,275,776,666.60
5. Step 5: Solve for x
   x = 11,275,776,666.60/112,743.32
6. Step 6: Final answer
   x = 100,012.82