Finding the Fourth Proportional to 139,050.93, 191,889.15 and 78,633.45

Step by Step Solution

1. Step 1: Write the proportion equation
   139,050.93 : 191,889.15 = 78,633.45 : x
2. Step 2: Convert to fraction form
   139,050.93/191,889.15 = 78,633.45/x
3. Step 3: Cross multiply
   139,050.93x = 191,889.15 × 78,633.45
4. Step 4: Simplify right side
   139,050.93x = 15,088,905,882.07
5. Step 5: Solve for x
   x = 15,088,905,882.07/139,050.93
6. Step 6: Final answer
   x = 108,513.52