Finding the Fourth Proportional to 215,422, 297,088.82 and 134,856.86

Step by Step Solution

1. Step 1: Write the proportion equation
   215,422 : 297,088.82 = 134,856.86 : x
2. Step 2: Convert to fraction form
   215,422/297,088.82 = 134,856.86/x
3. Step 3: Cross multiply
   215,422x = 297,088.82 × 134,856.86
4. Step 4: Simplify right side
   215,422x = 40,064,465,406.31
5. Step 5: Solve for x
   x = 40,064,465,406.31/215,422
6. Step 6: Final answer
   x = 185,981.31