Finding the Fourth Proportional to 92,407.89, 138,590.93 and 42,439.96

Step by Step Solution

1. Step 1: Write the proportion equation
   92,407.89 : 138,590.93 = 42,439.96 : x
2. Step 2: Convert to fraction form
   92,407.89/138,590.93 = 42,439.96/x
3. Step 3: Cross multiply
   92,407.89x = 138,590.93 × 42,439.96
4. Step 4: Simplify right side
   92,407.89x = 5,881,793,025.33
5. Step 5: Solve for x
   x = 5,881,793,025.33/92,407.89
6. Step 6: Final answer
   x = 63,650.33