Finding the Fourth Proportional to 191,443.75, 286,664.01 and 134,978.20

Step by Step Solution

1. Step 1: Write the proportion equation
   191,443.75 : 286,664.01 = 134,978.20 : x
2. Step 2: Convert to fraction form
   191,443.75/286,664.01 = 134,978.20/x
3. Step 3: Cross multiply
   191,443.75x = 286,664.01 × 134,978.20
4. Step 4: Simplify right side
   191,443.75x = 38,693,392,074.58
5. Step 5: Solve for x
   x = 38,693,392,074.58/191,443.75
6. Step 6: Final answer
   x = 202,113.63