Finding the Fourth Proportional to 123,609,300.16, 170,589,456.04 and 81,720,587.48

Step by Step Solution

1. Step 1: Write the proportion equation
   123,609,300.16 : 170,589,456.04 = 81,720,587.48 : x
2. Step 2: Convert to fraction form
   123,609,300.16/170,589,456.04 = 81,720,587.48/x
3. Step 3: Cross multiply
   123,609,300.16x = 170,589,456.04 × 81,720,587.48
4. Step 4: Simplify right side
   123,609,300.16x = 13,940,670,565,482,434
5. Step 5: Solve for x
   x = 13,940,670,565,482,434/123,609,300.16
6. Step 6: Final answer
   x = 112,780,110.78