Finding the Fourth Proportional to 98,905.86, 136,492.56 and 56,468.34

Step by Step Solution

1. Step 1: Write the proportion equation
   98,905.86 : 136,492.56 = 56,468.34 : x
2. Step 2: Convert to fraction form
   98,905.86/136,492.56 = 56,468.34/x
3. Step 3: Cross multiply
   98,905.86x = 136,492.56 × 56,468.34
4. Step 4: Simplify right side
   98,905.86x = 7,707,508,285.55
5. Step 5: Solve for x
   x = 7,707,508,285.55/98,905.86
6. Step 6: Final answer
   x = 77,927.72