Finding the Fourth Proportional to 139,615,235.17, 192,666,673.72 and 76,897,173.61

Step by Step Solution

1. Step 1: Write the proportion equation
   139,615,235.17 : 192,666,673.72 = 76,897,173.61 : x
2. Step 2: Convert to fraction form
   139,615,235.17/192,666,673.72 = 76,897,173.61/x
3. Step 3: Cross multiply
   139,615,235.17x = 192,666,673.72 × 76,897,173.61
4. Step 4: Simplify right side
   139,615,235.17x = 14,815,522,657,908,064
5. Step 5: Solve for x
   x = 14,815,522,657,908,064/139,615,235.17
6. Step 6: Final answer
   x = 106,116,804.80