Finding the Fourth Proportional to 291,874.76, 437,775.89 and 78,659.34

Step by Step Solution

1. Step 1: Write the proportion equation
   291,874.76 : 437,775.89 = 78,659.34 : x
2. Step 2: Convert to fraction form
   291,874.76/437,775.89 = 78,659.34/x
3. Step 3: Cross multiply
   291,874.76x = 437,775.89 × 78,659.34
4. Step 4: Simplify right side
   291,874.76x = 34,435,162,182.02
5. Step 5: Solve for x
   x = 34,435,162,182.02/291,874.76
6. Step 6: Final answer
   x = 117,979.24