Finding the Fourth Proportional to 78,980.95, 118,492.20 and 28,385.09

Step by Step Solution

1. Step 1: Write the proportion equation
   78,980.95 : 118,492.20 = 28,385.09 : x
2. Step 2: Convert to fraction form
   78,980.95/118,492.20 = 28,385.09/x
3. Step 3: Cross multiply
   78,980.95x = 118,492.20 × 28,385.09
4. Step 4: Simplify right side
   78,980.95x = 3,363,411,026.91
5. Step 5: Solve for x
   x = 3,363,411,026.91/78,980.95
6. Step 6: Final answer
   x = 42,585.09