Finding the Fourth Proportional to 139,076,492.61, 191,915,958.42 and 77,191,959.63

Step by Step Solution

1. Step 1: Write the proportion equation
   139,076,492.61 : 191,915,958.42 = 77,191,959.63 : x
2. Step 2: Convert to fraction form
   139,076,492.61/191,915,958.42 = 77,191,959.63/x
3. Step 3: Cross multiply
   139,076,492.61x = 191,915,958.42 × 77,191,959.63
4. Step 4: Simplify right side
   139,076,492.61x = 14,814,368,914,709,396
5. Step 5: Solve for x
   x = 14,814,368,914,709,396/139,076,492.61
6. Step 6: Final answer
   x = 106,519,575.21