Finding the Fourth Proportional to 139,051.32, 191,892.15 and 75,389.28

Step by Step Solution

1. Step 1: Write the proportion equation
   139,051.32 : 191,892.15 = 75,389.28 : x
2. Step 2: Convert to fraction form
   139,051.32/191,892.15 = 75,389.28/x
3. Step 3: Cross multiply
   139,051.32x = 191,892.15 × 75,389.28
4. Step 4: Simplify right side
   139,051.32x = 14,466,611,026.15
5. Step 5: Solve for x
   x = 14,466,611,026.15/139,051.32
6. Step 6: Final answer
   x = 104,037.93