Finding the Fourth Proportional to 127,678.47, 191,510.51 and 56,580.63

Step by Step Solution

1. Step 1: Write the proportion equation
   127,678.47 : 191,510.51 = 56,580.63 : x
2. Step 2: Convert to fraction form
   127,678.47/191,510.51 = 56,580.63/x
3. Step 3: Cross multiply
   127,678.47x = 191,510.51 × 56,580.63
4. Step 4: Simplify right side
   127,678.47x = 10,835,785,024.52
5. Step 5: Solve for x
   x = 10,835,785,024.52/127,678.47
6. Step 6: Final answer
   x = 84,867.75