Finding the Fourth Proportional to 139,008.95, 191,830.27 and 78,577.47

Step by Step Solution

1. Step 1: Write the proportion equation
   139,008.95 : 191,830.27 = 78,577.47 : x
2. Step 2: Convert to fraction form
   139,008.95/191,830.27 = 78,577.47/x
3. Step 3: Cross multiply
   139,008.95x = 191,830.27 × 78,577.47
4. Step 4: Simplify right side
   139,008.95x = 15,073,537,286.02
5. Step 5: Solve for x
   x = 15,073,537,286.02/139,008.95
6. Step 6: Final answer
   x = 108,435.73