Finding the Fourth Proportional to 85,070.72, 127,684.86 and 42,980.42

Step by Step Solution

1. Step 1: Write the proportion equation
   85,070.72 : 127,684.86 = 42,980.42 : x
2. Step 2: Convert to fraction form
   85,070.72/127,684.86 = 42,980.42/x
3. Step 3: Cross multiply
   85,070.72x = 127,684.86 × 42,980.42
4. Step 4: Simplify right side
   85,070.72x = 5,487,949,068.48
5. Step 5: Solve for x
   x = 5,487,949,068.48/85,070.72
6. Step 6: Final answer
   x = 64,510.43