Finding the Fourth Proportional to 138,662,856.63, 191,352,389.31 and 76,781,866.59

Step by Step Solution

1. Step 1: Write the proportion equation
   138,662,856.63 : 191,352,389.31 = 76,781,866.59 : x
2. Step 2: Convert to fraction form
   138,662,856.63/191,352,389.31 = 76,781,866.59/x
3. Step 3: Cross multiply
   138,662,856.63x = 191,352,389.31 × 76,781,866.59
4. Step 4: Simplify right side
   138,662,856.63x = 14,692,393,627,678,164
5. Step 5: Solve for x
   x = 14,692,393,627,678,164/138,662,856.63
6. Step 6: Final answer
   x = 105,957,673.06